ID:DA16473497
Conference on Arid Lands in a Changing World, International
Arid Lands in a Changing World, International Conference on
International Conference on Arid Lands in a Changing World, University of Arizona, 1969
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edited by Harold E. Dregne
[American Association for the Advancement of Science] 1970 Publication of the American Association for the Advancement of Science no. 90
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