1. Breed, R. S., Murray, E. G. D. & Smith, N. R., 1957. Bergey's Manual of Determinative Bacteriology, 7th ed. Williams & Wilkins, Baltimore.
2. Buchanan, R. E., Holt, J. G. & Lessel, E. G., 1966. Index Bergeyana. Williams & Wilkins, Baltimore.
3. Colwell, R. R. & Mandel, M., 1964. Adansonian analysis of deoxyribonucleic acid base composition of some gram-negative bacteria. J. Bacteriol. 82: 913–919.
4. Corey, R. R. & Starr, M. P., 1957. Colony types ofXanthomonas phaseoli. J. Bacteriol. 74: 137–140.
5. Cowan, S. T. & Steel, K. J., 1965. Manual for the identification of medical bacteria. University Press, Cambridge.