TY  - RPRT
TI  - Meteorological variables and concentrations of helium, carbon dioxide, and oxygen in soil gases collected regularly at a single site for more than a year
AU  - M. E. Hinkle
AU  - J. L. Ryder
PY  - 1987
DO  - 10.3133/ofr87449
UR  - https://pubs.usgs.gov/publication/ofr87449
ID  - ofr87449
ER  -