Howell, P.G.; Kumm, N.A.; Botha, M.J.; South Africa. Dept. of Agricultural Technical Services; Tustin, R.C.; De Lange, M.; Reinecke, R.K.; Walker, Jane B.; De Kock, V.E.
(Pretoria : Government Printer, 1970)
Previously the isolation and identification of strains of bluetongue virus has been tedious, so that the
introduction of techniques to shorten the delay was considered highly desirable.
Neutralization tests were conducted ...