TY  - RPRT
TI  - High-precision 40Ar/39Ar age spectrum dating of sanidine from the Middle Pennsylvanian Fire Clay tonstein of the Appalachian basin
AU  - Michael J. Kunk
AU  - Charles L. Rice
PY  - 1994
DO  - 10.1130/spe294-p105
UR  - https://pubs.usgs.gov/publication/70207650
ID  - 70207650
ER  -