FIRST OF REFUGEES ARRIVE ON COAST
1st contingent of S Vietnamese refugees, 190, arrives at Travis Air Force Base, Calif; many are 'on their own'; virtually no records are available at base on where they are going or why they were given seats on 3 flights; immigration aide Gordon Davidson says they have to rept to immigration when they reach their destination; all came from Clark Air Force Base in Philippines via Hickam Air Force Base in Honolulu; USAF aide Lt Col T W Sturgess comments; San Francisco immigration office comments on methods used to increase quotas; illus of S Vietnamese boy shouting for joy at Travis base (M)