TY  - RPRT
TI  - 40Ar/39Ar age spectra of some undisturbed terrestrial samples
AU  - G. Brent Dalrymple
AU  - M. A. Lanphere
PY  - 1974
DO  - 10.1016/0016-7037(74)90146-x
UR  - https://pubs.usgs.gov/publication/70010200
ID  - 70010200
ER  -