1. ANDREWES, F. W. (1922) : Studies in group agglutination. I. The Salmonella group and its antigenic structure. J. Path. & Bact., 25, 505-521.
2. BRUNER, D. W. & EDWARDS, P. R. (1941) : The demonstration of nonspecific components in Salmonella paratyphi A by induced variation. J. Bact., 42, 467-478.
3. DEACON, W. E. (1952) : Antigenic study of certain slow lactose fermenting Aerobacter cloacae cultures. Proc. Soc. Exper. Biol. &Med., 81, 165-170.
4. EDWARDS, P. R. & BRUNER, D. W. (1939) : The demonstration of phase variation in Salmonella abortus equi. J. Bact., 38, 63-72.
5. EDWARDS, P. R. & BRUNER, D. W. (1942) : A description of an unusual Salmonella type with special reference to the evolution of Salmonella species. J. Bact., 44, 289-300.