TY  - RPRT
TI  - 40Ar/39Ar systematics and argon diffusion in amber: Implications for ancient earth atmospheres
AU  - G. P. Landis
AU  - L.W. Snee
PY  - 1991
DO  - 10.1016/0921-8181(91)90127-i
UR  - https://pubs.usgs.gov/publication/70016480
ID  - 70016480
ER  -