A little at a time, I have been collecting vintage issues of Air Trails, American Modeler (and the two years of concurrently published Model Aviation), and American Aircraft Modeler. All are official publications of the Academy of Model Aeronautics (AMA). I am not publishing any current Model Aviation editions that began in April of 1975. As of May 2010, I finally procured the last few editions to complete the set of AAM, covering January 1968 through March 1975 (87 issues). Yeah, they're pretty much worthless to people who were not modelers in the era, but it is a nice trip back in time for us older guys.
Just recently, I acquired the 1959 set of Model Aviation magazines that were published concurrently with American Modeler for at least 1959 and 1960. The physical size is only 5½" x 7½". They had no table of contents. Content was primarily reporting on contests and official AMA business. There is a good graphic on the AMA website that shoes the publication history.
Here is the description given by the AMA for Model Aviation:
"MODEL AVIATION is the monthly news bulletin of the Academy of Model Aeronautics and is "The Independent Voice of American Aeromodeling." Published by the AMA at 1025 Connecticut Avenue, N.W., Washington 6, D. C. Editor: Clifford J. Allum. News and photos of club and contest activity always welcome for publication. Copyright 1959 by the Academy of Model Aeronautics. Permission is given for reprint or quote provided source is given. Subscription rate to non-members is $1 per year. For subscriptions outside the United States, add 50 cents for postage. Second class postage paid at Washington, D. C. "
If you need an article from one of these issues, send me an e-mail and I'll scan it and post it for you.