http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 map ; 31 x 23 cm. on sheet 61 x 80 cm.
Modified Mercalli Intensity Scale of 1931 on sheet.
Miscellaneous field studies (United States. Geological Survey.) ; map MF-1262