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- Irrigation projects 2852
- Klamath Project (U.S.) -- History 2556
- Irrigation 1064
- Agriculture 608
- Klamath Straits Drain (Oregon) 490
- Tule Lake Sump (California) 452
- Dams 420
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- United States. Bureau of Reclamation 3040
- Stein, D.W. 551
- Kline, D.J. 328
- Bergloff, Andrew M. 190
- Greene, K.J. 185
- Grise, Dorwin 116
- Lawrence, C.D. 100
- Oregon State University. Extension Service 90
- Wamstad, C. O. 81
- Legg, J.W. 78
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