COMPARISON BETWEEN HI TITERS OF ND IMMUNE SERUM FROM EYE-DROP AND INTRA-NASAL ROUTES IN SPF CHICKEN = PERBANDINGAN TITER HI DARI KEKEBALAN ND ANTARA VAKSIN TETES MATA DAN 1NTRANASAL - Perpustakaan UGM, i-lib ([Yogyakarta] : Universitas Gadjah Mada, 2002)