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Detroit, MI: General Motors. Good. 1939. Eleventh Printing. Booklet. 32 pages. Illustrated. Describes "a few of the hundreds of tests" employed at the General Motors Proving Ground. From these brief descriptions may be gained a little insight into General Motors' system for finding facts...to build better cars" .

Department of Public Relations General Motors, 1939. Softcover. Fair. Ninth Printing. The wraps are rubbed and worn. Internally, there is a previous owners inscription and stamp mark on the title page. Otherwise clean. Tightly bound. [ak]. Our orders are shipped using tracked courier delivery services.