TY  - RPRT
TI  - Progress report on the hydrology of the Martinsburg Formation in Lehigh and Northampton Counties, Pennsylvania
AU  - C.W. Poth
PY  - 1969
DO  - 10.3133/ofr69212
UR  - https://pubs.usgs.gov/publication/ofr69212
ID  - ofr69212
ER  -