Air Progress April 1973 Haiti Caribbean Aviation Man-Powered Flight Magazine

Air Progress Magazine / February 1973 / Amphib Flyoff / Crash Worthiness Nader

Air Progress Magazine August 1973 Aero Commander 112 Aviation Pilot Report

Vintage Scale R/C Modeler Magazine Summer 1977 Radio Control Models

Air Progress Magazine lot of 3 1973 January February March

Air Progress Magazine February 1975

Air Progress Magazine February 1981

Mother Earth News Issue 101