Columbia subject headings:
Europe--Politics and government--1918-1945--Handbooks, manuals, etc.
Europe--Politics and government--1945---Handbooks, manuals, etc.
International agencies--Handbooks, manuals, etc.
Harvard subject headings:
Europe--Politics and government--1918-1945--Handbooks, manuals, etc.
Europe--Politics and government--1945---Handbooks, manuals, etc.
International agencies--Handbooks, manuals, etc.
Princeton subject headings: