TY  - RPRT
TI  - A direct correlation among indoor Rn, soil gas Rn and geology in the Reading Prong near Boyertown, Pennsylvania
AU  - G.M. Reimer
AU  - L.C.S. Gundersen
PY  - 1989
UR  - https://pubs.usgs.gov/publication/70015771
ID  - 70015771
ER  -