TY  - RPRT
TI  - The Lower Cretaceous Figuera Lava and Fajardo Formation in the stratigraphy of northeastern Puerto Rico
AU  - Reginald Peter Briggs
PY  - 1973
DO  - 10.3133/b1372g
UR  - https://pubs.usgs.gov/publication/b1372G
ID  - b1372G
ER  -