http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Central America--Pacific Coast, Mexico--Guatemala--El Salvador, Puerto Madero to Acajutla
1st ed., Aug. 31, 1985 (Correct through NM 35/85).
from surveys to 1975 ; prepared and published by the Defense Mapping Agency Hydrographic/Topographic Center.
Relief shown by contours and spot heights.