TY  - BOOK
AU  - Swartz,Frank McKim
TI  - Trenton and sub-Trenton of outcrop areas: in New York, Pennsylvania and Maryland,
T2  - Pennsylvania Geological Survey. Bulletin G 22
PY  - 1948///
CY  - [Harrisburg]
PB  - Topographic and Geologic Survey
KW  - Geology, Stratigraphic
KW  - Ordovician
KW  - Geology
KW  - Middle Atlantic States
N1  - "Pennsylvania Geological Survey. 4th series."; "Reprinted from Bulletin of the American Association of Petroleum Geologists, vol. 32, no. 8."
ER  -