Worthington, R.W.; Mulders, M.S.G.; Weiss, K.E.
(Pretoria : The Government Printer, 1969)
The CF test was used to investigate the serological relationship of Br. ovis to Br. abortus and Br. melitensis. A definite antigenic relationship between Br. ovis and Br. abortus could be demonstrated. Definitive results ...