1. 1) MAC CALLUM, P.: J. Path. & Bact. 60 (1948) 93
2. 2) TOLHURST, J. C., Buckle, G.: J. Path. & Bact. 60 (1948) 107
3. 3) BUCKLE, G., TOLHURST, J. C.: J. Path. & Bact. 60 (1948) 119
4. 4) PARD-CASTELLÓ, V. et al: Internat. J. Lep. 19 (1951) 187
5. 8) KNAYSI, G. et al: J. Bact. 60 (1950) 423