TY  - RPRT
TI  - Direct radiometric measurement by gamma-ray scintillation spectrometer: Part I: Uranium And Thorium Series In Equilibrium
PY  - 1956
DO  - 10.1130/0016-7606(1956)67[395:drmbgs]2.0.co;2
UR  - https://pubs.usgs.gov/publication/70216325
ID  - 70216325
ER  -