Search for exactly "Irrigation -- Colorado River Region (Colo.-Mexico) -- Maps"

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1. Topographic map of the Boulder Canyon Reservoir site, 1930
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2. Map and operational diagram, lower Colorado River, Lees Ferry to Gulf of California, June 1973
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3. Map and operational diagram, lower Colorado River, Lees Ferry to Gulf of California, May 1957
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4. Map of Colorado River Basin, 1928
 

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