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5
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Proceedings of the Workshop on soybean rust in the Western hemisphere : November 14-17, 1976, Mayagüez institute of tropical agriculture, Mayagüez, Puerto Rico / ed. by Nader G. Vakili.
- U.S. department of agriculture. Agricultural research service,
- 1978.
- [Washington, DC] :
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The markets of Bolivia / by Rollo S. Smith and Ralph H. Ackerman.
- United States department of commerce. Bureau of foreign and domestic commerce,
- 1925.
- [Washington, DC] :
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Food and agriculture organization : organization, work, and U.S. participation / by Ralph W. Phillips.
- U.S. Department of agriculture. Foreign agricultural service,
- 1978.
- [Washington, DC] :
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Urban development in Iran / Ralph Warburton.
- U.S. Department of housing and urban development. Office of international affairs,
- 1971.
- [Washington, DC] :
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Zimbabwe's new entrepreneurs : an emerging success story? / by Ralph Bradburd, Brian Levy.
- World bank. Regional program on enterprise development,
- 1995.
- [Washington, DC] :