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Author
Appalachian Petroleum Geology Symposium
Published
Morgantown, W.V. : Morgantown Energy Research Center, Springfield, Va. : Available from National Technical Information Service, 1976.
Online
Location
HathiTrust Digital Library >> Online Resource
Format
Books / Online
Author
Oros, Margaret O., 1912-
Published
Urbana, Ill. : Illinois State Geological Survey, 1961.
Online
Location
HathiTrust Digital Library >> Online Resource
Format
Books / Online
Author
Ells, Garland Delos
Published
Lansing : Michigan Dept. of Natural Resources, Geological Survey Division, 1979.
Online
Location
HathiTrust Digital Library >> Online Resource
Format
Books / Online