作者 | Manchester, Alden C. / C N. Shaw / Denis Ferrol Dunham / Duane A. Paul / James Kasal / Jerome M. Stam / Leslie Whitener Smith / Paul R. Myers / Richard F. Fallert / Theodore Raymond Eichers / Thomas F. Stinson / United States. Department of Agriculture. Economic Research Service / United States. Department of Agriculture. Economic Research Service. National Economic Analysis Division / Walter G. Heid |