http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Geohydrology of the Aguirre and Pozo Hondo areas, southern Puerto Rico
Puerto Rico Industrial Development Company
1 online resource (vi, 43 pages) : illustrations, maps.
by Robert P. Graves ; prepared in cooperation with the Puerto Rico Industrial Development Company.
Includes bibliographical references (page 43).
Water-resources investigations report ; 91-4124