Tractor Costs and Rates of Performance: A Preliminary Report of Data Secured in 1939 Covering the Cost of Operation and the Rate of Performance on Farm Tractors in Minnesota

2026-07-09http://hdl.handle.net/123456789/566795Tractor Costs and Rates of Performance: A Preliminary Report of Data Secured in 1939 Covering the Cost of Operation and the Rate of Performance on Farm Tractors in MinnesotaText