File:Map of Youghiogheny River Watershed in Pennsylvania Maryland West Virginia.jpg
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current | 00:12, 18 June 2020 | 2,404 × 3,366 (823 KB) | Michael Sechler | Uploaded a work by U.S. Dept. of Agriculture, Soil Conservation Service, Regional Cartographic Division, Upper Darby, PA from Survey Report: Youghiogheny River Watershed: Program for Runoff and Waterflow Retardation and Soil Erosion Prevention. Washington, DC: U.S. Dept. of Agriculture, 1951. https://archive.org/details/CAT10683298/ with UploadWizard |
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