1. Factors affecting ovulation rate in the pig;Anderson,1972
2. Studies on the oestrus and ovarian activity during five successive oestrous cycles in gilts;Andersson;Acta Vet. Scand.,1980
3. Statistical Methods in Medical Research;Armitage,1971
4. Effect of season on age at puberty in crossbred gilts in Sweden;Bane,1976
5. Puberty in relation to rearing intensity and breed;Bane,1978