TY  - RPRT
TI  - Scintillation spectrometer II: simultaneous measurement of uranium, thorium and potassium in common rocks
AU  - Patrick M. Hurley
PY  - 1955
DO  - 10.3133/tei522
UR  - https://pubs.usgs.gov/publication/tei522
ID  - tei522
ER  -