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Spangler, E., Heider, L. E., Bech Nielsen, S., Dorn, C. R., & Hoffsis, G. F. (1985). Serum enzyme-linked immunosorbent assay (ELISA) response of calves vaccinated with a killed Mycobacterium paratuberculosis vaccine. Abstracts Of Papers Presented At The Annual Meeting Of The Conference Of Research Workers In Animal Disease, 66, 57.