TY  - RPRT
TI  - Water resources data for Puerto Rico, water year 1977. Surface and quality-of-water records and ground water records
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1980
DO  - 10.3133/wdrpr771
UR  - https://pubs.usgs.gov/publication/wdrPR771
ID  - wdrPR771
ER  -