TY  - RPRT
TI  - Tertiary geology of the coastal plains of Puerto Rico
AU  - Alfred D. Zapp
AU  - Harlan Richard Bergquist
AU  - C.R. Thomas
PY  - 1948
DO  - 10.3133/om85
UR  - https://pubs.usgs.gov/publication/om85
ID  - om85
ER  -