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Subjects
Natural resources, Agriculture, Irrigation, Drainage, Economic aspects of Agriculture, Research, Agricultural conservation, Agricultural extension work, Bibliography, Conservation of natural resources, Economic aspects of Conservation of natural resources, Economic aspects of Drainage, Economic aspects of Irrigation, Irrigated Soils, Land tenure, Power resources, Water resources developmentPlaces
United StatesID Numbers
- OLID: OL1952098A
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August 22, 2008 | Edited by RenameBot | fix author name |
April 1, 2008 | Created by an anonymous user | initial import |