Yazar
Philip Holcomb Stephens
3 cilt bulundu.
Cilt sonuçları
Systems of farming in Oklahoma
Philip Holcomb Stephens · Oklahoma Agricultural and Mechanical College, Agricultural Experiment Station
56 sayfa · 1931
Wheat / Farm management
Farm production costs in Oklahoma, 1931
Philip Holcomb Stephens · Oklahoma Agricultural and Mechanical College, Agricultural Experiment Station
56 sayfa · 1933
Farm management / Agriculture / Costs