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2. Bergey's Manual of Determinative Bacteriology;Breed, R.S.; Murray, E.G.D.; Smith, N.R.,1957
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4. Christensen, W. B. (1946). Ibid., 52, 461.
5. Ewing, W. H., Davis, B. R., and Reavis, R. W. (1959). CDC Laboratory Manual. Communicable Disease Center, Atlanta, Georgia.