Author
Geological Survey (U.S.)
14 results
De Witt, Wallace, Jr., 1920-2012
2 results
Biesecker, James E., 1941-
1 results
Brightbill, Robin A.
1 results
Brown, Deborah E.
1 results
Carpenter, David H.
1 results
Colton, George Willis, 1920-
1 results
Demarest, David F.
1 results
Eckhardt, David A.
1 results
George, J. Richard
1 results
Griswold, W. T.
1 results
Herb, William J.
1 results
Koerkle, Edward H.
1 results
Munn, M. J. (Malcolm John), 1874-1949
1 results
Pennsylvania. Department of Environmental Protection
1 results
Pepper, James F.
1 results
Read, C. B.
1 results
Rowan, Elisabeth L.
1 results
Ryder, Robert T.
1 results
Shaw, L. C.
1 results
Sloto, Ronald A.
1 results
Sobashinski, John R.
1 results
Staubitz, W. W. (Ward W.)
1 results
United States. Environmental Protection Agency
1 results
United States. National Park Service
1 results
White, I. C. (Israel Charles), 1848-1927
1 results