TY  - RPRT
TI  - An Appalachian isochron: A kaolinized Carboniferous air-fall volcanic-ash deposit (tonstein)
AU  - P.C. Lyons
PY  - 1992
DO  - 10.1130/0016-7606(1992)104<1515:aaiakc>2.3.co;2
UR  - https://pubs.usgs.gov/publication/70016921
ID  - 70016921
ER  -