Katz J B, Chieves L P, Hennager S G, Nicholson J M, Fisher T A, Byers P E
Diagnostic Bacteriology Laboratory, National Veterinary Services Laboratories, Veterinary Services, Animal and Plant Health Inspection Service, US Department of Agriculture, Ames, IA 50010, USA.
J Vet Diagn Invest. 1999 May;11(3):292-4. doi: 10.1177/104063879901100316.