TY  - RPRT
TI  - Potassium-argon geochronology of some metamorphic, igneous, and hydrothermal events in Puerto Rico and the Virgin Islands
AU  - Dennis P. Cox
AU  - Richard F. Marvin
AU  - John W. McGonigle
AU  - David H. McIntyre
AU  - Cleaves Lincoln Rogers
PY  - 1977
UR  - https://pubs.usgs.gov/publication/70233485
ID  - 70233485
ER  -