Columbia subject headings:
International cooperation.
International law.
International organization.
International relations.
League of Nations.
Peace.
World War, 1914-1918.
Harvard subject headings:
International cooperation
International law.
International organization
League of Nations
Peace
World War, 1914-1918
Princeton subject headings:
International cooperation.
International law.
International organization.
League of Nations.
Peace.
World War, 1914-1918.