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- a49010220 contributor B12858469.
- a49010220 created "1948.".
- a49010220 date "1948".
- a49010220 date "1948.".
- a49010220 dateCopyrighted "1948.".
- a49010220 extent "1457-1492 p.".
- a49010220 isPartOf "Pennsylvania. Bureau of Topographic and Geologic Survey. Bulletin G ; 21.".
- a49010220 isPartOf "Pennsylvania. Topographic and Geologic Survey. Bulletin G 21".
- a49010220 issued "1948".
- a49010220 issued "1948.".
- a49010220 language "eng".
- a49010220 publisher "[Harrisburg] Topographic and Geologic Survey,".
- a49010220 spatial "United States.".
- a49010220 subject "551.731".
- a49010220 subject "Geology United States.".
- a49010220 subject "Geology, Stratigraphic Ordovician.".
- a49010220 subject "QE662 .F4".
- a49010220 title "Subsurface Trenton and sub-Trenton rocks in Ohio, New York, Pennsylvania and West Virginia.".
- a49010220 type "text".