John Deere Model B - Wikipedia

John Deere B tractor photos information

John Deere Model M - Wikipedia

John Deere B tractor information

John Deere 4020 - Wikipedia

List of John Deere tractors - Wikipedia

File:2014, 1937 John Deere Model B, Forneris Farms, Mission HIlls, California - panoramio.jpg - Wikimedia Commons

John Deere - Wikipedia

John Deere Model B - Wikipedia

John Deere 6620, Tractor & Construction Plant Wiki

John Deere two-cylinder Model B

John Deere 730, Tractor & Construction Plant Wiki

John Deere - Wikipedia

File:John Deere model B tractor, Agricultural and Industrial Museum York.jpg - Wikimedia Commons