Editore: Associated Aviation Underwriters, Chicago; New York; Los Angeles, 1940
Da: Books on the Square, Virden, IL, U.S.A.
Prima edizione
Soft cover. Condizione: Very Good. 1st Edition. 1940. 1st Edition. Very Good paperback. A square, tight and clean copy. 61pp. (Uu).
Editore: Associated Aviation Underwriters, 1944
Da: Dilly Dally, Mobile, AL, U.S.A.
Soft cover. Condizione: Near Fine. Fourth Edition. Intact tight binding, slight outer wear, no markings. 63 pages.