SPENCER, H. C.
Aeronautical drafting; a supplement to Technical drawing by Giesecke, Mitchell and Spencer, by H. C. Spencer & Creighton Merrell. (Engineering science series)
SPENCER, H. C. Aeronautical drafting; a supplement to Technical drawing by Giesecke, Mitchell and Spencer, by H. C. Spencer & Creighton Merrell. (Engineering science series) © 25Aug42; AA408142. Macmillan Co. (PWH); 8Jun70; R486005.
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