TY  - RPRT
TI  - Ar40/Ar39 age spectrum dating of biotite from Middle Ordovician bentonites, eastern North America
AU  - Michael J. Kunk
AU  - John F. Sutter
PY  - 1984
UR  - https://pubs.usgs.gov/publication/70210406
ID  - 70210406
ER  -