Quinlan, J.; Steyn, H.P.; Du Toit, P.J.
(Pretoria : The Government Printer, 1940)
1. Thirty-six greyhound bitches between the ages of six and 12 months have been oophorectomised.
2. The oophorectomised bitches have never shown the psychological or clinical symptoms of "heat".
3. Two oophorectomised ...