References Martin XB-68
andrade, john m. (1979). u.s. military aircraft designations , serials since 1909. earl shilton, leicester: midland counties publications. isbn 0-904597-22-9.
butler, tony (2010). american secret projects. hinckley, england: midland publishing. isbn 978-1-85780-331-0.
knaack, marcelle size (1988). encyclopedia of u.s. air force aircraft , missile systems, volume ii - post-world war ii bombers 1945-1973. washington, d.c.: office of air force history, usaf. isbn 0-912799-59-5.
wagner, ray (1968). american combat planes (2nd ed.). garden city: doubleday , company. isbn 0-385-04134-9.
Comments
Post a Comment