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Oklahoma Historical Society
Preserving Oklahoma's rich history.
Oklahoma Steam Threshers Association - March of Ma
Pawnee, OK-based group preserving Oklahoma's rich heritage of the early threshing days of the early 1900's; steam traction engines and other old iron.
The March of Machines
Official site of Pawnee-based Oklahoma Steam Threshers Association, dedicated to preserving Oklahoma's heritage of the threshing days of the early 1900s. Steam traction engines and other old iron.