Columbia subject headings:
Administrative agencies--Records and correspondence--Law and legislation--Congresses.
Business communication--Iraq--Congresses.
Iraq--History--To 634--Congresses.
Manuscripts, Greek (Papyri)--Congresses.
Harvard subject headings:
Administrative agencies--Records and correspondence--History--Congresses.
Administrative agencies--Records and correspondence--Law and legislation--Congresses.
Business communication--History--To 1500--Congresses.
Classical letters--History and criticism--Congresses.
Iraq--History--To 634--Congresses.
Legal documents--History--To 1500--Congresses.
Manuscripts, Greek (Papyri)--Congresses.
Manuscripts--History--To 1500.
Princeton subject headings:
Administrative agencies--Records and correspondence--Law and legislation.
Business communication--Iraq--History--To 634.
Iraq--History--To 634.
Manuscripts, Greek (Papyri)
Mesopotamia--History.