TY  - RPRT
TI  - Principal facts for gravity stations in Adams, Berks, Cumberland, Dauphin Lancaster, Lebanon, and York Counties, south-central Pennsylvania
AU  - S. L. Snyder
AU  - D. L. Daniels
PY  - 1987
DO  - 10.3133/ofr87511
UR  - https://pubs.usgs.gov/publication/ofr87511
ID  - ofr87511
ER  -