http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
produced by the Cartographic Division, National Geographic Society ; John B. Garver, Jr., chief cartographer ; John F. Shupe, associate chief ; production, Charles F. Case ... [and others].
Relief shown by shading and spot heights. Depths shown by gradient tints and soundings.
Includes notes, glossary, and key to abbreviations.
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