TY  - RPRT
TI  - Water resources data for Pennsylvania, water year 1977; Volume 1, Delaware River basin
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1978
DO  - 10.3133/wdrpa771
UR  - https://pubs.usgs.gov/publication/wdrPA771
ID  - wdrPA771
ER  -