[1] Top-level Element: <originInfo> (MODS Ver. 3 User Guidelines: Metadata Object Description Schema, Library of Congress) () https://www.loc.gov/standards/mods/userguide/origininfo.html

marccountry – This source code is used for the MARC country codes. See the MARC Code List for Countries for a listing of the codes and place names.

[2] MARC Code List for Countries (Library of Congress) () https://www.loc.gov/marc/countries/