Robert Boyle's technical and training manuals: 'Army Air Forces Instrument Letdown Procedures' (Air Service Command, Patterson Field, Ohio, 1944) (MC 371/576/7, USF 12/9)
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Robert Boyle's technical and training manuals: 'Army Air Forces Instrument Letdown Procedures' (Air Service Command, Patterson Field, Ohio, 1944)
103
MC 371/576/7, USF 12/9
1 volume
1944
489th Bomb Group
Robert N. Boyle
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