Op de tenen lopen zonder vakantie / door Willem Helfferich Complete Handleiding voor den Beginnenden Vlieger : het vliegen in theorie en praktijk / door J.A. Bach ; [voorw. Frans Habnit] standard operations manual Standard tools for Milling, Turning & Misc. Cutting standard operations manual Standard tools for D.S., A.N.D., L.S. & M.S. Operations standard operations manual Standard tools for Forming Operations U.S. Military Aviation in Europe, 1970 Energy-Maneuverability (U) / [voorw. Walter P. Glover, Colonel USAF Director, Air Force Armament Laboratory ; J.E. Roberts, Major General, USAF Commander, Air Proving Ground Center] U.S.A.F. Unit Code Letters / by Roger A. Freeman and George Pennick Militaire Luchtvaart Autoriteit : mission first, safety always / door Willem Helfferich Prop-swing Cats Over the Atlantic : VPB-73 in World War II / by Robert L. Carlisle ; with a foreword by VADM Charles S. Minter, Jr., … Aviation Department of the Royal Army Museum in Brussels : 144 Civil and Military Aircraft / [written by Charlie de la Royère]
