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

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

DIRT BIKE MAGAZINE-JULY 1975 PENTON 250 CR250M1 ELSINORE MAICO 400MX VINTAGE

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

Cycle Magazine Vtg 1976 Yamaha 750 Suzuki Triumph Penton Pomeroy Jeep

Machine Design Magazine April 1975 Penton Electric Motors & Controls Reference

4 TH ISSUE JUNE 1970 NEW ENGLAND TRAIL RIDER MAGAZINE TRIALS PENTON BULTACO OSSA

Cycle Magazine Vtg 1977 Honda Yamaha Suzuki Kawasaki Motocross Husqvarna Penton