http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
compiled and drawn in the Cartographic Division of the National Geographic Society ; Wellman Chamberlin, chief cartographer ; Athos D. Grazzini, associate chief cartographer.
"Supplement to National geographic, October, 1969, volume 136, number 4."
On verso: Pacific Ocean floor, 1:36,432,000.
Scale 1:36,432,000. 1 in. = 575 miles at the equator ;