VICTORY THRU AIRPOWER, BY MAJOR ALEX. P. DESEVERSKY, PUBLISHED BY SIMON AND SCHUSTER

“AIRCRAFT ENGINE INSTRUCTOR”, BY A.L. DYKE, PUBLISHED BY GOODHEART WILLCOX CO., CHICAGO, 1928, ILLUSTRATED, STIFF PAPER COVERS, GENERAL INSTRUCTIONAL MANUAL OF EARLY AIRCRAFT ENGINES, 372 PAGES, VG