1. The need for water quality criteria for frogs.
2. & Cowan, Steel, G.I. Barrow, and R.K.a Feltham, 1993 . Manual for the Identification of Medical Bacteria , p. 317 . Cambridge University Press, Cambridge.
3. G.N. Frerichs, and S.D. Millar, 1993 . Manual for the Isolation and Identification of Fish Bacterial Pathogens , pp. 49, 53 . Pisces Press, Stirling.