TY  - RPRT
TI  - First-principles calibration of 38Ar tracers :implications for the ages of 40Ar/39Ar fluence monitors
AU  - Marvin A. Lanphere
AU  - G. Brent Dalrymple
PY  - 2000
DO  - 10.3133/pp1621
UR  - https://pubs.usgs.gov/publication/pp1621
ID  - pp1621
ER  -