http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
reconnaissance of the water resources of the central Guanajibo Valley, Puerto Rico
1 online resource (vi, 47 pages) : illustrations, maps.
by Eloy Colón-Dieppa and Ferdinand Quiñones-Márquez.
"Prepared in cooperation with the Puerto Rico Department of Agriculture."
Includes bibliographical references (pages 47).
Water-resources investigations report ; 82-4050