TY  - RPRT
TI  - A possible petroleum related helium anomaly in the soil gas, Boulder and Weld Counties, Colorado
AU  - Alan A. Roberts
AU  - M.C. Dalziel
AU  - L.A. Pogorski
AU  - S.G. Quirt
PY  - 1976
DO  - 10.3133/ofr76544
UR  - https://pubs.usgs.gov/publication/ofr76544
ID  - ofr76544
ER  -