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Gyro-magnetic compass ...

APA Citation

Sperry Gyroscope Company, i. (1945). Gyro-magnetic compass ... Great Neck, N.Y.: Sperry gyroscope company, inc..

Sperry Gyroscope Company, inc. Gyro-magnetic Compass ... Great Neck, N.Y.: Sperry gyroscope company, inc., 1945.

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