TITO TELLS NIXON BIG POWERS ALONE CAN'T MAKE PEACE
Pres Tito, in Belgrade talks with Nixon, decries expansion of war in Indochina in what appears to be criticism of US; suggests 2-power diplomacy may even have encouraged big power meddling in affairs of others and created 'dangerous hotbeds of conflict'; Nixon refuses to accept implied proposition that Amer involvement amounted to an infringement on rights of smaller nation; defends US actions