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 Year: 1940
 Collection: Government Documents A to Z Digitization Project
 Collection: World War Two Collection
Theory of ballooning.

Theory of ballooning.

Date: April 25, 1940
Creator: United States. War Dept.
Description: A general guide to piloting a free balloon.
Contributing Partner: UNT Libraries Government Documents Department
Grinding machines

Grinding machines

Date: November 26, 1940
Creator: United States. Army. Air Corps
Description: This report provides the definition of grinding and discusses different processes, types, and operations of grinding.
Contributing Partner: UNT Libraries Government Documents Department
Lathes

Lathes

Date: November 29, 1940
Creator: United States. Army. Air Corps
Description: A guide to the operation and maintenance of lathes for general shop work.
Contributing Partner: UNT Libraries Government Documents Department