White Clay Creek Preserve, Chester County, Pennsylvania, New Castle County, Delaware : a scenic valley and the arc corner

door Faill, Rodger T.
[Harrisburg, Pa.] : Commonwealth of Pennsylvania, Department of Environmental Resources, Office of Parks and Forestry, Bureau of Topographic and Geologic Survey and Bureau of State Parks : State of Delaware, Delaware Geological Survey and Department of Natural Resources and Environmental Control, Division of Parks and Recreation, 1991

Middle Devonian stratigraphy in central Pennsylvania : a revision /

door Faill, Rodger T., Hoskins, Donald M., Wells, Richard B.
Harrisburg : Pennsylvania Geological Survey, 1978

Geology and mineral resources of the Millerstown Quadrangle, Perry, Juniata, and Snyder Counties, Pennsylvania /

door Faill, Rodger T.
[Harrisburg] : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Bureau of Topographic and Geologic Survey, 1974

Geology and mineral resources of the Montoursville South and Muncy quadrangles and part of the Hughesville quadrangle, Lycoming, Northumberand, and Montour Counties, Pennsylvania /

door Faill, Rodger T.
Harrisburg, Pa. : Commonwealth of Pennsylvania, Dept of Environmental Resources, Bureau of Topographic and Geologic Survey, 1979

Geology and mineral resources of the Salladasburg and Cogan Station quadrangles, Lycoming County, Pennsylvania /

door Faill, Rodger T.
Harrisburg : Pennsylvania Geological Survey, 1977

Geology and mineral resources of the Blandburg, Tipton, Altoona, and Bellwood quadrangles, Blair, Cambria, Clearfield, and Centre Counties, Pennsylvania /

door Faill, Rodger T.
Harrisburg : Commonwealth of Pennsylvania, Dept. of Environmental Resources, Office of Resources Management, Bureau of Topographic and Geologic Survey, 1989

Bedrock geology and mineral resources of the Linden and Williamsport quadrangles, Lycoming County, Pennsylvania /

door Faill, Rodger T.
Harrisburg : Pennsylvania Geological Survey, 1977