Aviation Fuels and their effects on Engine Performance. Prepared by Ethyl Corporation, Supplied to U. S. Air Forces, order AF-33(600)5312,
Department of the Navy, Bureau of Aeronautics, contract no. 52-202,
Printed in U. S. A., 1951.
 
Heavy cover crease that goes into page 28 with cover soil and small bottom corner chip and shifted spine. Owner name on cover. About 11 x 8-1/2  with 145 pages.