TY  - RPRT
TI  - Geologic map of the Yauco and Punta Verraco quadrangles, Puerto Rico
AU  - R.D. Krushensky
AU  - W. H. Monroe
PY  - 1979
DO  - 10.3133/i1147
UR  - https://pubs.usgs.gov/publication/i1147
ID  - i1147
ER  -