Specialization and pork production methods in relation to over-all farm resource use and integration /
Heady, Earl O.(Earl Orel),1916-1986,author.
Gibbons, James R.,author.
Irwin, George,author.
Iowa State University.Agricultural and Home Economics Experiment Station.
Iowa State University.Department of Economics and Sociology.
Iowa State University.Center for Agricultural and Economic Adjustment.
Title from front cover.
Includes bibliographical references.