http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Water resources of the Sabana Seca to Vega Baja area, Puerto Rico
1 online resource (vi, 53 pages) : illustrations, maps.
by Arturo Torres-González and José R. Díaz.
"Prepared in cooperation with the Puerto Rico Department of Agriculture."
Includes bibliographical references (pages 51-52).
Water-resources investigations report ; 82-4115