A history of the Water Resources Branch of the United States Geological Survey: vol. III years of 50-50 cooperation, July 1, 1928 to June 30, 1939
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1939 ◽
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1953 ◽
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1910 ◽
Vol 38
(4)
◽
pp. 535-536
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1910 ◽
Vol 38
(3)
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pp. 360-361
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