Alexander, R.A.; Haig, D.A.; Adelaar, T.F.; Du Toit, P.J.
(Pretoria : The Government Printer, 1947)
1. A strain of virus (University Farm strain) was adapted to propagation
in the developing chick embryo by incubation of infected eggs containing
8 day embryos at 33.6°C. but not at 32.1°C., 35.0°C. or 38.2°C.
2. ...