new vanguard V-1 flying bomb 1942-52 : Hitler's infamous 'doodlebug' / Steven J. Zaloga ; ill. by Jim Laurier ; [ed.: Simone Drinkwater] case for the UFO : unidentified flying objects / M.K. Jessup Flying saucers / Donald H. Menzel Behind the flying saucers / F. Scully report on unidentified flying objects / E.J. Ruppelt
