Includes bibliographical references (pages 67-68).
Also available via Internet from the USGS web site. Address as of 7/10/08: http://pubs.usgs.gov/wri/wri034317/ ; current access available via PURL.
Surface-water resources assessment of the Municipio of Mayagüez, Puerto Rico, 1999-2002 / by Luis Santiago-Rivera and Fernando Gómez-Gómez -- Sanitary quality of surface water during base-flow conditions in the Municipio of Mayagüez, Puerto Rico, 2000-2002 / by Senén Guzmán-Rios, Fernando Gómez-Gómez, and Mario L. Oliveras-Feliciano -- Hydrogeologic terranes and ground-water resources in the Municipio of Mayagüez, Puerto Rico,1999-2002 / by Jesús Rodríguez-Martínez