Quinlan, J.; Roux, L.L.; De Lange, M.; Van Aswegen, W.G.; Du Toit, P.J.
(Pretoria : The Government Printer, 1948)
1. The effects of a dry ration, high condition, and the restriction of sunlight, and exercise upon sexual activity and reproduction of beef females have been studied.
The observations were conducted on 30 grade (mostly ...