TY  - RPRT
TI  - Radium concentrations in ground water of the Chickies Formation, southeastern Pennsylvania, 1986-87
AU  - L. DeWayne Cecil
PY  - 1989
DO  - 10.3133/ofr87232
UR  - https://pubs.usgs.gov/publication/ofr87232
ID  - ofr87232
ER  -