TY  - RPRT
TI  - A cooperative investigation of precision and accuracy in chemical, spectrochemical, and modal analysis of silicate rocks
AU  - H.W. Fairbairn
AU  - and others
PY  - 1951
DO  - 10.3133/b980
UR  - https://pubs.usgs.gov/publication/b980
ID  - b980
ER  -