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- a61009637 contributor B12887674.
- a61009637 created "1961.".
- a61009637 date "1961".
- a61009637 date "1961.".
- a61009637 dateCopyrighted "1961.".
- a61009637 description "Bibliography: p. 19-22.".
- a61009637 extent "22 p.".
- a61009637 issued "1961".
- a61009637 issued "1961.".
- a61009637 language "eng".
- a61009637 publisher "[Harrisburg] Commonwealth of Pennsylvania, Dept. of Internal Affairs, Topographic and Geological Survey,".
- a61009637 spatial "Mississippi River Valley.".
- a61009637 spatial "New York (State)".
- a61009637 spatial "Pennsylvania.".
- a61009637 subject "Geology Mississippi River Valley.".
- a61009637 subject "Geology New York (State)".
- a61009637 subject "Geology Pennsylvania.".
- a61009637 subject "Geology, Stratigraphic Cambrian.".
- a61009637 subject "Geology, Stratigraphic Ordovician.".
- a61009637 subject "QE656 .W12".
- a61009637 title "Subsurface Cambro-Ordovician stratigraphy of northwestern Pennsylvania and bordering states.".
- a61009637 type "text".