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4
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Forages : the science of grassland agriculture / ed. by Maurice E. Heath, Darrel S. Metcalfe, Robert F. Barnes.
- 873
- Iowa State University Press,
- 1975.
- Ames :
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Externalities in the transformation of agriculture : distribution of benefits and costs from development / ed. by Earl O. Heady, Larry R. Whiting.
- Iowa State University Press,
- 1975.
- Ames :
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Food aid and international economic growth / Uma K. Srivastava...[et al.].
- 873
- Iowa State University Press,
- 1975.
- Ames :
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Panama's economic development : the role of agriculture / William C. Merrill...[et al.].
- 876.7
- Iowa State University Press,
- 1975.
- Ames :