Columbia subject headings:
Arbitration (International law)
International Peace Conference (1st : 1899 : Hague, Netherlands)
International Peace Conference (2nd : 1907 : Hague, Netherlands)
Harvard subject headings:
Arbitration (International law)--Congresses.
International Peace Conference (1st : 1899 : Hague, Netherlands)
International Peace Conference (2nd : 1907 : Hague, Netherlands)
Princeton subject headings: