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Study of alternative economic strategies for the development of arid and semi-arid lands : a summary report on a conference jointly organized by the United Nations institute for training and research and the California department of water resources, held at Sacramento, California, United States of America, 31 May to 10 June 1977 / [prep. by Kel Deming].
- United Nations,
- [ca. 1977].
- [New York] :