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United States of America - Humphrey, Hubert
United States of America - Bundy, William P.
Union of Soviet Socialist Republics - Nikita Khrushchev
United States of America - Kennedy, John F.
United States of America - Nixon, Richard M.
United States of America - Muskie, Edmund S.
Vatican - Pope Paul VI
Yemen Arab Republic
Vatican - Pope Paul VI
Upper Volta