Photograph taken for a story in the Oklahoma Times newspaper. Caption: "Still playing the part of the unemotional killer, William Edward Cook jr., the former Missouri bicycle thief, was slated to be arraigned in El Centro, Calif., Saturday for his sixth slaying."

Photograph taken for a story in the Oklahoma Times newspaper. Caption: "Badman William E. Cook, right , multiple slayer, has little chance to escape as the diminutive killer is led into an El Centro, Calif., courtroom for his sanity trial in connection with the shooting of Robert H. Dewey, Seattle salesman."

Photograph taken for a story in the Daily Oklahoman newspaper. Caption: "William E. Cook jr., 23-year-old slayer of six persons, will be tried by California for the murder of his sixth victim."

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Al Butler's "Calexico Colossal" is part dream, part hope - and partly built."

Yearbook for class 32 of the British Refresher School at the Aero Center in Imperial, California. The book includes pictures of the graduates and staff, as well as cartoons and short bios of each student.

Memo to Mr. Ebremayer regarding the price of bids for equipment, bedding, kitchen equipment, and dining room tables and benches.

Letter from The Chief of the Bureau of Aeronautics to The Chief of the U.S. Army Air Force discussing the proposed basing of Army training units at the Imperial County Airport in El Centro, California.

Yearbook for class 32 of the British Refresher School at the Aero Center in Imperial, California. The book is dedicated to William (Bill) J. Hewitt, Jr. who passed away "in performance of his chosen profession," and includes pictures of the graduates and staff.

Interview with K.O. Dahlgren, civil engineer and Marine Corps veteran. The interview includes Dahlgren's personal experiences about being a PBJ co-pilot in the Southwest Pacific Theater during World War II, enlisting in the Navy, primary and secondary flight training through the Civilian Pilot Training Program, pre-flight training, basic and advanced flight training, and navigation school. Additionally, Dahlgren talks about his early interest in aviation, designation as an Aviation Cadet, the transition to multi-engine planes at Corpus Christi and his transfer to the Marine Corps, transferring to Cherry Point, North Carolina, crew formation and PBJ training at Cherry Point, advanced training, his personal views on combat and the Japanese, stationing to Green Island, "night heckling" missions to Rabaul, his assignment to and living conditions in Emirau, skip-bombing, strafing, and night bombing missions, rest and relaxation in Australia, his rotation back to the states, and his postwar career.

Abstract: The manganese deposits of the Paymaster district, in Imperial County, Calif., extend along steeply inclined normal fault fissures which cut Tertiary (?) volcanic breccia and fanglomerate. The ore deposits are in part open-space fillings composed largely of psilomelane, and in part fault breccia replaced by psilomelane, pyrolusite, and manganite. Calcite and rock fragments are the chief impurities. High-grade ore now exposed averages about 40 percent manganese, and contains much barium. About 3,000 tons of ore averaging 42 percent manganese was produced from the district by hand-sorting in 1917-18. It is estimated that nearly the same amount could be produced again, largely from present workings. In addition, a few tens of thousands of tons of milling ore, estimated to contain between 10 and 30 percent of manganese, are believed to exist in veins one to three feet wide within one or two hundred feet of the surface.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.

The National Museum of the Pacific War presents an interview with Albert Finley. Finley joined the Marine Corps around December of 1943. He provides vivid details of his boot camp experiences. He served with Headquarters Company, 4th Marines, as a radar mechanic on Corsairs, repairing radio and radar gear. Beginning in September of 1944 they traveled to Guam, Kwajalein, Pearl Harbor and Majuro in the Marshall Islands. Finley shares a number of anecdotal stories, including working with POWs. He was discharged in the fall of 1946.

The National Museum of the Pacific War presents an interview with Albert Finley. Finley joined the Marine Corps around December of 1943. He provides vivid details of his boot camp experiences. He served with Headquarters Company, 4th Marines, as a radar mechanic on Corsairs, repairing radio and radar gear. Beginning in September of 1944 they traveled to Guam, Kwajalein, Pearl Harbor and Majuro in the Marshall Islands. Finley shares a number of anecdotal stories, including working with POWs. He was discharged in the fall of 1946.

Purpose and scope: The purpose of this study was to develop a method for estimating the amount of subsurface return flow to the Colorado River in the Yuma area. This report presents a method that will permit an accounting of ground-water return flows from each side of the Colorado River in the Yuma reach. The estimates of return flow can be used by water-management agencies in determining return-flow credits for the States of Arizona and California.

Purpose and scope: The purpose of this study was to develop a method for estimating the amount of subsurface return flow to the Colorado River in the Yuma area. This report presents a method that permits an approximate accounting of ground-water return flow from each side of the Colorado River in Yuma reach. The method presented in this report was developed specifically for application in the Yuma area. The validity of the assumptions inherent in the method was evaluated on the basis of the local hydrologic system. The applicability of the method to other hydrologic systems is not addressed in this report.

Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story about Mountain view, Richland, Eastfield and El Centro schools which are making up the Dallas county community college district amended first semester summer enrollment figures.

Letter from Harris Leon Kempner to Mr. Francisco Guerrero M. informing him of Harris Leon Kempner, Jr.'s, upcoming trip to Mexicali. He provides Kempner, Jr.'s, travel information, asks the he be shown Kempner properties there, and requests that he meet Mr. Stone and Mr. Calvin and other business associates in the area.

From Abstract: The report presents a compilation and technical assessment of the existing data on climate, geology, hydrology, water chemistry, and seismicity for four geothermal areas in the United States: Imperial Valley and The Geysers, California; Klamath Falls, Oregon; and the Rio Grande Rift Zone, New Mexico.

Newsletter written for supervisors working at the Convair Division in Fort Worth containing news about events and activities, workplace reminders, and other relevant information.

Letter from WASP Cornelia Yerkes discussing ferrying a P-51 from Long Beach to El Centro, living accommodations in Long Beach, and her busy schedule. Typed on Mayo Hotel (Tulsa) stationary.

Letter from Harris L. Kempner to Isaac H. and Henrietta Leonora Blum Kempner discussing several general points of interest, such as Harris' recent visits and other travel business, the cotton business and Harris' recent upcoming visits.