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Population and development modelling : proceedings of the United Nations/UNFPA expert group meeting on population and development modelling, Geneva, 24-28 September 1979 / [contrib. by David E. Horlacher...et al.].
- United Nations,
- 1981.
- New York, NY :
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The development of groundwater resources with special reference to deltaic areas (transactions of the Regional seminar on the development of groundwater resources with special reference to deltaic areas, held at Bangkok, Thailand, from 24 April to 8 May 1962) / [prep. by David K. Todd and Gerard Santing].
- 850.1
- United Nations,
- 1963.
- New York, NY :