Examinando por Autor "Schwantes, Arthur J."

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Tractor Costs and Rates of Performance: A preliminary report of data secured in 1933 covering the cost of operation and the rate of performance of farm tractors in Minnesota
Pond, George A.; Schwantes, Arthur J.
Tractor Costs and Rates of Performance: A Preliminary Report of Data Secured in 1934 Covering the Cost of Operation and the Rate of Performance of Farm Tractors in Minnesota
Pond, George A.; Schwantes, Arthur J.
Tractor Costs and Rates of Performance: A Preliminary Report of Data Secured in 1935 Covering the Cost of Operation and the Rate of Performance of Farm Tractors in Minnesota and Summaries for 1933 and 1934
Pond, George A.; Schwantes, Arthur J.
Tractor Costs and Rates of Performance: A Preliminary Report of Data Secured in 1936 Covering the Cost of Operation and the Rate of Performance of Farm Tractors in Minnesota and Summaries for 1933, 1934 and 1935
Pond, George A.; Schwantes, Arthur J.
Tractor Costs and Rates of Performance: A Preliminary Report of Data Secured in 1937 Covering the Cost of Operation and the Rate of Performance on Farm Tractors in Minnesota and Summaries for 1933, 1934, 1935 and 1936
Pond, George A.; Schwantes, Arthur J.
Tractor Costs and Rates of Performance: A Preliminary Report of Data Secured in 1938 Covering the Cost of Operation and the Rate of Performance on Farm Tractors in Minnesota and summaries for 1933, 1934, 1935, 1936, and 1937
Pond, George A.; Schwantes, Arthur J.
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
Pond, George A.; Schwantes, Arthur J.
Tractor Costs and Rates of Performance: A preliminary report of data secured in 1940 covering the cost of operation and the rate of performance on farm tractors in Minnesota
Pond, George A.; Schwantes, Arthur J.
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
Pond, George A.; Schwantes, Arthur J.