http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
sheet 1. Uracas Island -- sheet 2. Maug Islands -- sheet 3. Asuncion Island.
Set includes various issues of some sheets.
"Form lines shown at approximately 100 meter interval ... Heights in meters."
Marginal maps: Index to boundaries.--Index to adjoining sheets.