TY  - RPRT
TI  - Analytical precision of one-sixth order semiquantitative spectrographic analysis
AU  - J. M. Motooka
AU  - D. J. Grimes
PY  - 1976
DO  - 10.3133/cir738
UR  - https://pubs.usgs.gov/publication/cir738
ID  - cir738
ER  -