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

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

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

Air Progress Magazine September 1968 Douglas A-4 Skyhawks Aviation Jets

Air Progress Magazine / July 1968 / No Label / Arizona's Secret Clipped-Wing

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

Air Progress Magazine / October 1968 / No Label / Man Who Taught Red Baron

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