Engine, handpiece straight ;
engine, handpiece angle /
War Department.

APA Citation

United States. War Office., United States. War Dept. (1944). Engine, handpiece straight: engine, handpiece angle. Washington, D.C.: War Dept..

MLA Citation

United States. War Office, and United States. War Dept. Engine, Handpiece Straight: Engine, Handpiece Angle. Washington, D.C.: War Dept., 1944.

Warning: These citations may not always be complete (especially for serials).