TY  - RPRT
TI  - Fission-track dating of lower Paleozoic volcanic ashes in British stratotypes
AU  - Reuben James Ross
AU  - Charles W. Naeser
AU  - Glen Arthur Izett
PY  - 1977
DO  - 10.3133/ofr77348
UR  - https://pubs.usgs.gov/publication/ofr77348
ID  - ofr77348
ER  -