http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Map showing total intensity geomagnetic field of the Caribbean Region
1 map ; 83 x 165 cm., folded in envelope 25 x 31 cm.
by James E. Matthews ; Department of the Interior, United States Geological Survey ; prepared in cooperation with the United States Naval Oceanographic Office.
Miscellaneous field studies ; map MF-742