TY  - RPRT
TI  - Nitrate contamination of the upper aquifer in the Manatí-Vega Baja area, Puerto Rico
AU  - Carlos Conde-Costas
AU  - Fernando Gomez-Gomez
PY  - 1998
UR  - https://pubs.usgs.gov/publication/70171274
ID  - 70171274
ER  -