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Physiological aspects of crop yield : proceedings of a symposium held in Lincoln, NE, January 20-24, 1969 / ed. by Jerry D. Eastin...[et al.].
- 873
- American society of agronomy [etc.],
- 1969.
- Madison, WI :
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Guidelines for cooperatives in developing economies : a book of readings / contrib. Herbert C. Fledderjohn...[et al.] ; ed. by Mary Jean McGrath ; pref. by Jerry Voorhis.
- University of Wisconsin. International cooperative training center,
- 1969.
- Madison, WI :