Water quality in the Appalachian Valley and Ridge, the Blue Ridge, and the Piedmont physiographic provinces, eastern United States by L.I. Briel.
Briel, L.I.
Water quality in the Appalachian Valley and Ridge, the Blue Ridge, and the Piedmont physiographic provinces, eastern United States by L.I. Briel. - Washington, DC : U.S. Geological Survey, 1997. - D115p; illust. 30cm - U.S. Geological Survey professional paper ; 1422-D .
eng
0607868422
Water quality--Appalachian Region.
Water quality in the Appalachian Valley and Ridge, the Blue Ridge, and the Piedmont physiographic provinces, eastern United States by L.I. Briel. - Washington, DC : U.S. Geological Survey, 1997. - D115p; illust. 30cm - U.S. Geological Survey professional paper ; 1422-D .
eng
0607868422
Water quality--Appalachian Region.