Instruction guide.
Sound locator M2.
APA Citation
Sperry Gyroscope Company. (1940). Instruction guide: Sound locator M2. [Washington, D.C.: U.S. Govt. Print. Off..
MLA Citation
Sperry Gyroscope Company. Instruction Guide: Sound Locator M2. [Washington, D.C.: U.S. Govt. Print. Off., 1940.
Warning: These citations may not always be complete (especially for serials).