1. An approach to the measurement of sexual behaviour and semen production of dairy bulls;Almquist,1956
2. Variation in incentive stimulation and sexual behavior in the male rat;Fowler;J. comp. physiol. Psychol.,1961
3. The behaviour of swine;Hafez,1962
4. Relation of sexual behavior to germ cell output in farm animals;Hale;J. Dairy Sci.,1960