Special edition of a technical manual containing training documentation on three subjects related to instrument flying. The name, "Hottman, W. B." is written in the top left corner of the cover, followed by a handwritten note about returning the manual.

Special edition of a technical manual containing training documentation on three subjects related to instrument flying. A blotch of dark ink is smeared on the front covered.

Special edition of a textbook titled "Instrument Flying: Basic and Advanced," published January 15, 1944. It is split into three sections, all with different creation and publication dates. The first section is titled "Instrument Flying: Basic without Radio Aids" or Technical Order No. 30-100A-1, published June 1, 1943. The second section is titled "Instrument Flying: Advanced with Radio Aids" or Technical Order No. 30-100B-1, published January 15, 1944 to replace T. O. No. 30-100B-1 dated October 1, 1943. The final section is titled "Instrument Flying Army Air Forces Instrument Approach System" or Technical Order No. 30-100F-1, published November 10, 1943.

Textbook titled "Instrument Flying: Technique in Weather" or Technical Order No. 30-100D-1, created January 1, 1944 by authority of the Commanding General of the Army Air Forces.

Describes in detail the life cycle of the Melanotus Longulus wire worm, and in brief: the natural methods for its control, and the threat it poses to crops in southern California.

Discusses "radio communication fundamentals and the methods and technique involved in the installation and operation of radio communication equipment."

A manual for U.S. Army sailors assigned to the Harbor Boat Service. Describes company organization, duties of personnel, equipment used, and basic seamanship.

Describes the functions and services provided by the Army Special Service Company.