Resource Productivity in Iowa Farming

Auteur : Earl Orel Heady, Edna Douglas, J. Ronald Frazer, John Clifford Frey, John Francis Timmons, Landy Boyd Altman, Mary Stewart Lyle, Ernest J. Buresh, J. D. Nord, John C. O'Byrne, Russell Oscar Olson, Earl Raymond Swanson, Earl W. Kehrberg, Kathryn Philson, V. H. Nielsen

Date de publication : 1952

Éditeur : Agricultural Experiment Station, Iowa State College

Nombre de pages : 71