TY  - RPRT
TI  - Radon-222 content of natural gas samples from Upper and Middle Devonian sandstone and shale reservoirs in Pennsylvania—preliminary data
AU  - E. L. Rowan
AU  - T. F. Kraemer
PY  - 2012
DO  - 10.3133/ofr20121159
UR  - https://pubs.usgs.gov/publication/ofr20121159
ID  - ofr20121159
ER  -