Gyro-compass and gyro-pilot manual.

Manylion Llyfryddiaeth
Prif Awdur:	Sperry Gyroscope Company Inc
Fformat:	Llyfr
Cyhoeddwyd:	Brooklyn N.Y. Sperry Gyroscope Company Inc.,.
Pynciau:	Gyro compass. Gyroscope. Pilots and piloting.