Interview with Harold Branch, a diamond expert, concerning his recollections of the Crater of Diamonds and diamond mining near Murfreesboro, Arkansas from 1920 to 1950.

Interview with Margaret Dawson concerning her recollections of the Crater of Diamonds and diamond mining near Murfreesboro, Arkansas from 1951 to 1962.

Interview with Harold Lewis, an executive at Caltex Petroleum Corporation. He discusses his educational background, his employment with Standard Oil of California, his early experiences in refinery construction, his transfer to Caltex, his assignment to Bahrain, refinery construction in Australia (Boral, Ampol), refinery construction in Japan, and the relationship between Caltex and Nippon Oil. He also talks about military fuel oil contracts, postwar refinery expansion, Caltex East, Caltex in Korea and the Philippines, executive transfers, the decision of Texaco and Socal to re-enter the European market in 1967, crude purchases, and OPEC.

Interview with Murdo MacIver, an executive at Caltex Petroleum Corporation, discussing his experiences with the company. He comments on his educational background and early employment, his employment with Standard Oil Company of California, his transfer to Caltex in 1938, the expansion before World War II, Caltex during World War II, Bapco's refinery expansion, financing postwar refinery expansion, foreign exchange problems, banking syndicates, accounting methods, tanker construction, training of local nationals, T-2 tankers, the relationship between Caltex and subsidiaries, and Third World financial problems.

Interview with Robert Kirchhofer, an executive at Caltex Petroleum Corporation, concerning his experiences and reminiscences of his long-time career with the Caltex Corporation.

Interview with William Taylor, an executive at Caltex Petroleum Corporation from New York, about his experiences working for the company in the Philippines and Thailand, the joint venture refinery in Thailand, expansion of the company, and the move of headquarters from New York to Dallas.

Interview with Harrell Edmund Chiles, Chief Executive Officer and Chairman of the Board of the Western Company. He discusses his family, formation of the Western Company, oil exploration, history of the oil industry in Texas, his political views, and his "I'm Mad" campaign.

Interview with John Fosque, an executive at Caltex Petroleum Corporation, concerning his experiences as a long-time employee of Caltex (1936-1967).

Interview with Frederick Dittus, an executive at Caltex Petroleum Corporation. He discusses his educational background, his early job experience with Standard Oil Company of California, the Dittus-Boelter equation, his pre-World War II experiences in Nazi Germany, construction of the Bahrain refinery for Bapco, the formation of Caltex in 1936, his transfer to Caltex, his activities during World War II, the postwar refinery expansion, and the evolution of the Technical Services Division.

Interview with J. Frank Rollins, an oilman and a geophysicist, concerning his work experience with Petty Geophysical Engineering Company doing refraction seismic work; his employment with Geophysical Service, Inc.; doing reflection and refraction work in 1936; oil exploration in South America; work in oil field instrumentation equipment; work as a "computer" interpreting geological data; founding of Rayflex Exploration Company in 1948; technological developments for oil field exploration; geochemical surveying; the sale of Rayflex to Phillips-Eckhart in 1962; his work as a geophysical consultant; the application of oil field technology to national defense; German espionage activity in South America during World War II; and pro-German activity in South Louisiana during World War II.