Gas Engine Magazine 1974 September October Stirling Hot Air Engine

VTG New Mexico Magazine September/October 1974 Fall Color Issue

Gas Engine Magazine 1974 September October Stirling Hot Air Engine

National Aeronautics Magazine September-October 1974

Gas Engine Magazine, September-October 1975, Metcalf Miller, NF

Special Interest Auto Magazine September October 1974

Early Bird September-October 1974 Magazine

antique automobile magazine September October 1974