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- [43] STUDIES ON NATURAL OCCURRENCE OF NEUTRALIZING ANTIBODIES AGAINST 6 STRAINS OF BOVINE VIRAL DIARRHEA VIRUS IN FIELD SERA OF CATTLE ZENTRALBLATT FUR VETERINARMEDIZIN REIHE B-JOURNAL OF VETERINARY MEDICINE SERIES B-INFECTIOUS DISEASES IMMUNOLOGY FOOD HYGIENE VETERINARY PUBLIC HEALTH, 1976, 23 (08): : 669 - 677