TY - RPRT TI - Linear-traverse surveys of helium and radon in soil gas as a guide for uranium exploration, central Weld County, Colorado AU - G. Michael Reimer AU - R.S. Rice PY - 1977 DO - 10.3133/ofr77589 UR - https://pubs.usgs.gov/publication/ofr77589 ID - ofr77589 ER -