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2
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CROPWAT : a computer program for irrigation planning and management / developed by Martin Smith.
- Food and Agriculture Organization of the United Nations,
- 1992.
- Rome :
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Distribution and impact of helminth diseases of livestock in developing countries / H.J. Over, J. Jansen and P.W. van Olm.
- Food and Agriculture Organization of the United Nations,
- 1992.
- Rome :