TY  - RPRT
TI  - The use of soil-gas helium concentrations for earthquake prediction: Studies of factors causing diurnal variation
AU  - G. Michael Reimer
PY  - 1979
DO  - 10.3133/ofr791623
UR  - https://pubs.usgs.gov/publication/ofr791623
ID  - ofr791623
ER  -