Book 4 results 4 Government Document 2 results 2

Ashley, Geo. H. (George Hall), 1866-1951 1 results 1 Delaware Geological Survey 1 results 1 Delaware. Department of Natural Resources and Environmental Control 1 results 1 Delaware. Division of Parks and Recreation 1 results 1 Faill, Rodger T. 1 results 1 Fettke, Charles R. (Charles Reinhard), 1888-1959 1 results 1 Fleeger, Gary M. 1 results 1 Geological Survey (U.S.) 1 results 1 Pennsylvania 1 results 1 Pennsylvania. Bureau of State Parks 1 results 1 Pennsylvania. Bureau of Topographic and Geologic Survey 1 results 1 Pennsylvania. Department of Environmental Resources 1 results 1 Robinson, J. French, 1890- 1 results 1 see all…

English 4 results 4

Pennsylvania 4 results 4 Chester County 1 results 1 Chester County (Pa.) 1 results 1 Delaware 1 results 1 Mercer County 1 results 1 New Castle County 1 results 1 New Castle County (Del.) 1 results 1 United States 1 results 1 White Clay Creek (Pa. and Del.) 1 results 1 see all…