Tractor Costs and Rates of Performance: A Preliminary Report of Data Secured in 1941 Covering the Cost of Operation and the Rate of Performance on Farm Tractors in Minnesota and a Summary for the 3-Year Period, 1939-1941
Tractor Costs and Rates of Performance: A Preliminary Report of Data Secured in 1941 Covering the Cost of Operation and the Rate of Performance on Farm Tractors in Minnesota and a Summary for the 3-Year Period, 1939-1941