TY - RPRT TI - Geohydrologic, geochemical, and geologic controls on the occurrence of radon in ground water near Conifer, Colorado, USA AU - E. Lawrence AU - E. Poeter AU - R. Wanty PY - 1991 DO - 10.1016/0022-1694(91)90123-y UR - https://pubs.usgs.gov/publication/70016451 ID - 70016451 ER -