Columbia subject headings:
Fisheries--Iraq--History.
Sumerian language--Texts.
Ur (Extinct city)--Economic conditions.
Harvard subject headings:
Fisheries--Iraq--History--Sources.
Iraq--Antiquities.
Sumerian language--Texts.
Ur (Extinct city)--Economic conditions--Sources.
Princeton subject headings:
Fisheries--Iraq--History--Sources.
Sumerian language--Texts.
Ur (Extinct city)--Economic conditions--Sources.