Bergey's manual of determinative bacteriology/
John G. Holt, Noel R. Krieg, Peter H.A. Sneath, James T. Staley and Stanley T. Williams
- 9th ed.
- LWW, Philadelphia: 1994.
- xviii, 787 p.
The Spirochetes Aerobic/Microaerophilic, Motile Nonmotile Gram Negative