TY  - RPRT
TI  - Soil gas radon compared to aerial and ground gamma-ray measurements at study sites near Greeley and Fort Collins, Colorado
AU  - J. S. Duval
AU  - G.M. Reimer
AU  - R.R. Schumann
AU  - D.E. Owen
AU  - J. K. Otton
PY  - 1990
DO  - 10.3133/ofr90648
UR  - https://pubs.usgs.gov/publication/ofr90648
ID  - ofr90648
ER  -