Columbia subject headings:
Organisation for European Economic Co-operation--History--Sources.
Harvard subject headings:
Europe--Economic integration.
Monnet, Jean, 1888-1979--Correspondence.
Organisation for European Economic Co-operation--History--Sources.
Schuman, Robert, 1886-1963--Correspondence.
Statesmen--France--Correspondence.
Princeton subject headings:
Europe--Economic integration--History--Sources.