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California Geological Survey
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Contours (Cartography)
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Elevation
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Inland Waters
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1. Topographic Contours, Elk River Watershed, California, 1940-2000
1940. California Geological Survey, California. Department of Conservation, Marshall, Gerald, and Mendes, Eric. This line shapefile depicts contains topographic contours of the Elk River watershed in Humboldt County, California. These countours were derived f... California Geological Survey.