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edited by John W. Helmuth & Don F. Hadwiger
Greenwood Press 1993 Contributions in economics and economic history no. 143
Available at 29 libraries
edited by John W. Helmuth, Stanley R. Johnson ; foreword by Terry E. Branstad
Iowa State University Press for the Center for Agricultural and Rural Development 1989 1st ed
v. 1 , v. 2
Available at 16 libraries