TY  - RPRT
TI  - Emission spectrographic determination of trace elements in lunar samples
AU  - C. Annell
AU  - A. Helz
PY  - 1970
DO  - 10.1126/science.167.3918.52
UR  - https://pubs.usgs.gov/publication/70010224
ID  - 70010224
ER  -