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A Preliminary Report of Data Secured in 1926, 1927, and 1928 on the Farm Accounting Route at Crookston - Polk County - Minnesota
Sallee, George A., (1929)
A Preliminary Report of Cost of Crop Production from Data Secured in 1928 on the Farm Accounting Route at Crookston - Polk County - Minnesota
A Preliminary Report of Data Secured in 1927 on the Farm Accounting Route at Crookston - Polk County - Minnesota
Mumford, D. Curtis, (1928)