Columbia subject headings:
Sumerian language--Texts.
Umma (Extinct city)--Economic conditions--Sources.
Harvard subject headings:
Sumerian language--Texts.
Umma (Extinct city)--Politics and government--Sources.
Princeton subject headings:
British Museum--Catalogs.
Catalogs.
Sumerian language--Texts--Catalogs.
Umma (Extinct city)