Here are some useful and interesting links:
Gathering Of The Green
Farmersville Equipment
Pikeville Equipment Inc
John Deere Gifts
Tractor Links
Meli's Tractor School
Deerely Departed
Antique John Deere Tractors
Duane Larson's Two Cylinder Service Information
Green Magazine
The Old Tractor Company (Greg Stephen)
Sharp's Antique Tractor Works
M. E. Miller Tire Co.
Jorde's Decals
Deere Legacy
Antique Tractors Forum
Dennis Polk Equipment
Detwiler Tractor Parts
Greencollectors.com
Jensales
K&K Antique Tractors
Rusty Acres Restoration
Robert's Carburetor Repair
Farm Machinery Advertising Collectors
Historic American Parts (lawn and garden)
JD Crawler Parts
JohnDeere40.com
JohnnyPutt.com
Agricrafts
PopinJohn.com - Carburetors, Magnetos and More