TY  - RPRT
TI  - Direct radiometric measurement of the uranium and thorium series in equilibrium by gamma-ray scintillation spectrometer
AU  - Patrick M. Hurley
PY  - 1955
DO  - 10.3133/tei499
UR  - https://pubs.usgs.gov/publication/tei499
ID  - tei499
ER  -