TY  - BOOK
AU  - Hunt,Thomas Sterry
TI  - Special report on the trap dykes and Azoic rocks of southeastern Pennsylvania
T2  - Pennsylvania. Geological survey, 2d. [Report of progress
AV  - QE653 .H94
PY  - 1878///
CY  - Harrisburg
PB  - Pub. by the Board of commissioners for the Second geological survey
KW  - Geology
KW  - Pennsylvania
KW  - Geology, Stratigraphic
KW  - Archaean
N1  - At head of title: Second geological survey of Pennsylvania: 1875; No more published
ER  -