http://petcaretips.net/john-deere-60.html

http://www.retiredtractors.com/Popper/60.html

http://www.tractordata.com/farm-tractors/tractor-brands/johndeere/johndeere-tractors.html

http://www.antiquefarming.com/john-deere-tractor.html

http://search-desc.ebay.com/search/search.dll?query=john+deere+model+60&newu=1&krd=1&sosortproperty=32&sosortorder=2

http://stores.ebay.com/DAVE-COOK-TRACTOR-PARTS_JOHN-DEERE-MODEL-50-60-70_W0QQcolZ4QQdirZ1QQfsubZ17QQftidZ2QQtZkm

http://en.wikipedia.org/wiki/List_of_John_Deere_tractors

http://www.tractorshed.com/contents/tpic974.htm

http://petcaretips.net/john-deere-620.html

http://www.deerelydeparted.com/p-114-john-deere-service-manual-for-model-60-tractor-sm2008.aspx