TY  - RPRT
TI  - Semiquantitative spectrographic method for analysis of minerals, rocks, and ores
AU  - C. L. Waring
AU  - C. S. Annell
PY  - 2002
DO  - 10.1021/ac60080a008
UR  - https://pubs.usgs.gov/publication/70011071
ID  - 70011071
ER  -