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by Douglas D. Southgate; Douglas H. Graham (Ohio State University, USA ); Luther G. Tweeten (Professor Emeritus of Agricultural Marketing, Policy and Trade, Department of Agricultural, Environmental, and Development Economics, Ohio State University, Col
by Schulz, Donald E.; Graham, Douglas H.
by Douglas D. Southgate (Ohio State University, USA ); Douglas H. Graham (Ohio State University, USA ); Luther G. Tweeten (Ohio State University, USA )
by Graham, Douglas N.; Guest, James H.
by Adams, Dale W.; Graham, Douglas H.; Von Pischke, J. D.
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