Field trip to selected localities in the Great Valley, Triassic Basin, Blue Ridge, and Piedmont of Pennsylvania and Maryland, October 25 and 26, 1980 /

United States : [publisher not identified], 1980

Stratigraphy, sedimentology, and structure of Silurian and Devonian rocks along the Allegheny Front in Bedford County, Pennsylvania, Allegheny County, Maryland, and Mineral and Gra...

Harrisburg, Pa., Bureau of Topographic and Geologic Survey, 1972

Devonian shales in south-central Pennsylvania and Maryland /

by Dennison, John Manley, 1934-
[S.l. : Harrisburgh, Pa. : s.n.] ; distributed by: Field Conference of Pennsylvania Geologists, 1979

Slope stability and denudational processes: Central Appalachians /

Washington, D. C. : Geological Society of Washington, 1971

Guidebook for field trips, Atlantic City meeting, 1957.

[New York] 1957

Guidebook for field trips, Atlantic City meeting, 1957 /

New York : The Society, 1957