TY  - RPRT
TI  - Determination of selenium at trace levels in geologic materials by energy-dispersive X-ray fluorescence spectrometry
AU  - J.S. Wahlberg
PY  - 1981
DO  - 10.1016/0009-2541(81)90092-9
UR  - https://pubs.usgs.gov/publication/70011746
ID  - 70011746
ER  -