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4
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Duckweed aquaculture : a new aquatic farming system for developing countries / Paul Skillicorn, William Spira, and William Journey.
- World Bank,
- 1993.
- Washington, DC :
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Measurement of returns to adult health : morbidity effects on wage rates in Côte d'Ivoire and Ghana / T. Paul Schultz, Aysit Tansel.
- World Bank,
- 1993.
- Washington, DC :
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Redefining national security in Latin America : a workshop report / by Paul C. Psaila.
- Woodrow Wilson International Center for Scholars,
- 1993.
- Washington, DC :
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Agricultural policy and sustainability : case studies from India, Chile, the Philippines and the United States / ed. by Paul Faeth.
- World Resources Institute,
- 1993.
- Washington, DC :