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Last edited by Open Library Bot
December 4, 2010 | History
Discusses the need for conservation in the United States, the water cycle, erosion of soil and ways to stop it, slowing down running water, dams, transportation of water to cities and farms, and the need for planning to assure an adequate water supply
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Soil conservation, Water conservationPlaces
United StatesShowing 3 featured editions. View all 3 editions?
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Feedback?December 4, 2010 | Edited by Open Library Bot | Added subjects from MARC records. |
December 10, 2009 | Created by WorkBot | add works page |