TY  - RPRT
TI  - A modification of Shapiro's technique for determining low levels of CO 2 in silicate rocks
AU  - John R. Watterson
AU  - Walter H. Ficklin
AU  - John Hopkins Turner
PY  - 1976
DO  - 10.3133/ofr76530
UR  - https://pubs.usgs.gov/publication/ofr76530
ID  - ofr76530
ER  -