Machine Design Magazine April 1972-73 Penton Electronic Motors Reference Issue

Machine Design Magazine February 1973-1974 Penton Plastics/Elastomers Reference

Racer X Illustrated Aug Sept 1999 Motocross Magazine John Penton Shane Watts

Machine Design Magazine June 1976 Penton Mechanical Drives Reference Issue

Interior Design Magazine April 1977 - Vintage Historical Architecture Reference

July 1975 Dirt Bike motorcycle magazine Honda Elsinore Maico Husqvarna Penton

1978 MACHINE DESIGN MAGAZINE, Reference issue, Motors, Relays & Switches, Solid

Machine Design Magazine June 1973-1974 Penton Mechanical Drives Reference Issue