Altitude and configuration of the water-level surface in lower Paleozoic and Precambrian crystalline rocks in the Red Clay Creek Basin, Chester County, Pennsylvania, and New Castle County, Delaware, June through October 1989 and March 1990
Harrisburg, Pennsylvania : United States Department of the Interior, U.S. Geological Survey, 1991
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Altitude and configuration of the water-level surface in lower Paleozoic and Precambrian crystalline rocks in the Red Clay Creek Basin, Chester County, Pennsylvania, and New Castle County, Delaware, June through October 1989 and March 1990 / by Karen L. Vogel, Wendy L. Miller, and B. Craig McManus
Relief shown by contours and spot heights. "Prepared in cooperation with the Chester County Water-Resources Authority and the Delaware Geological Survey." Blue line print. Includes location map.