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- [9] STANDARDIZATION OF AN INDIRECT ENZYME-LINKED IMMUNOSORBENT-ASSAY (ELISA) FOR DETECTING ANTIBODIES TO AVIAN INFECTIOUS-BRONCHITIS VIRUS ZENTRALBLATT FUR VETERINARMEDIZIN REIHE B-JOURNAL OF VETERINARY MEDICINE SERIES B-INFECTIOUS DISEASES IMMUNOLOGY FOOD HYGIENE VETERINARY PUBLIC HEALTH, 1981, 28 (9-10): : 693 - 703