TY  - BOOK
AU  - Lohman,Stanley William
ED  - Geological Survey (U.S.)
TI  - Ground-water resources of Pennsylvania,
T2  - Pennsylvania. Topographic and Geologic Survey. Bulletin W7
AV  - GB1025.P4 L624
U1  - 551.4909748 
PY  - 1941///
CY  - Harrisburg, Pa.
PB  - Dept. of Internal Affairs, Topographic and Geologic Survey
KW  - Groundwater
KW  - Pennsylvania
KW  - Water-supply
N1  - At head of title: Pennsylvania Geologic Survey, fourth series
ER  -