TY  - RPRT
TI  - A semiquantitative spectrographic method for the analysis of minerals, rocks, and ores (II)
AU  - C. L. Waring
AU  - C.A. Annell
PY  - 1952
DO  - 10.3133/tei215
UR  - https://pubs.usgs.gov/publication/tei215
ID  - tei215
ER  -