Links to some of our favorite websites:

AntiqueTractorsForum.com

Gas Engine Magazine

Hart Parr Oliver.org

Iowa Cornbelt Oliver Collectors

Restore Roseville Store.com

Steam Traction Magazine

Swartzrock Implement Co.

TractorData.com

Yesterday's Tractors

History of:

Allis-Chalmers Company (from Tractorshed.com)

Allis-Chalmers Company (from Wikipedia.org)

Old Abe, the J.I. Case symbol

the J.I.Case company

the Rumely company