TY  - RPRT
TI  - Identification of excess 40Ar by the 40Ar 39Ar, age spectrum technique
AU  - M. A. Lanphere
AU  - G. Brent Dalrymple
PY  - 1976
DO  - 10.1016/0012-821x(76)90052-2
UR  - https://pubs.usgs.gov/publication/70011168
ID  - 70011168
ER  -