TY  - RPRT
TI  - Geologic map of the San Juan quadrangle, Puerto Rico
AU  - Maurice Henry Pease
AU  - Watson Hiner Monroe
PY  - 1975
DO  - 10.3133/ofr75252
UR  - https://pubs.usgs.gov/publication/ofr75252
ID  - ofr75252
ER  -