http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Water resources of the Rio Grande de Anasco - lower valley, Puerto Rico
1 online resource (vii, 48 pages) : illustrations.
"Prepared in cooperation with the Puerto Rico Department of Agriculture."
Includes bibliographical references (pages 47-48).
Water-resources investigations report ; 85-4237