TY  - RPRT
TI  - Geologic map of the San Juan Quadrangle, Puerto Rico
AU  - M. H. Pease
AU  - W. H. Monroe
PY  - 1977
DO  - 10.3133/i1010
UR  - https://pubs.usgs.gov/publication/i1010
ID  - i1010
ER  -