Air Progress Magazine-October, 1968-The Red Baron, P-40

Air Progress Magazine / February 1968 / No Label / New Air Rescue Technique

Air Progress Magazine / May 1968 / No Label / North Korea's Air Force

Air Progress Magazine / January 1968 / No Label / Piper Arrow Coast To Coast

Air Progress Magazine September 1968

Air Progress Magazine / September 1968 / No Label / When The Hawk Lost A Wing

Air Progress Magazine / November 1968 / No Label / Inside Story Of Hump Flyers

Air Progress Magazine / March 1968 / No Label / Ottumwa Fly-In For Antique Plane