Profitable and unprofitable cows co-operative cow-testing
Larson, C.W.
Profitable and unprofitable cows co-operative cow-testing - Pennsylvania 1919 - 1-15 p. - Cows Pennsylvania Agricultural Experiment Station. Extension Circular No. 43 .
Profitable and unprofitable cows co-operative cow-testing - Pennsylvania 1919 - 1-15 p. - Cows Pennsylvania Agricultural Experiment Station. Extension Circular No. 43 .