Air Progress December 1972 Hanggliders Short-Field Landings Magazine Aviation

Air Progress Magazine June 1972 Swift Turbo-Charged Conversion Aviation

Air Progress Magazine January 1972 Erich Hartmann Hippies Flying Aviation

Air Progress Magazine September 1973 Cessna 195 Aviation Airshow Special

Air Progress Magazine October 1972 BD-5 First Flight Test Results Aviation

Air Progress Magazine / November 1972 / Homebuilt Aircraft Extravaganza

Air Progress Magazine / February 1972 / Smyth Sidewinger / Bahamas / Students

Air Progress Magazine January 1975 Super Snoot 310R Cessna Aircraft