Murray, G.N.; Du Toit, P.J.
(Pretoria : The Government Printer, 1941)
Observations were made on Albino rats over a period of four
years (1933-37); 238 litters were obtained comprising 2043 young at
birth; 1789 (872 males and 917 females) were reared and weighed
weekly.
PRENATAL GROWTH.
(a) ...