TY  - BOOK
AU  - D'Invilliers,Edward Vincent
ED  - Geological Survey of Pennsylvania.
TI  - The geology of Lehigh and Northampton Counties
T2  - Second geological survey of Pennsylvania: report of progress,
AV  - QE157 .A16 vol. 16, pt. 1
PY  - 1883///
CY  - Harrisburg
PB  - Board of Commissioners for the Second Geological Survey
KW  - Geology
KW  - Pennsylvania
KW  - Lehigh County
KW  - Northampton County
N1  - Atlas sheets also illustrate D3, v. 2: The geology of the South Mountain belt of Berks County, by E.V. D'Invilliers
ER  -