1. The immunological measurement of pregnant mare serum gonadotrophin.;Allen;J. Endocrinol.,1969a
2. Factors influencing pregnant mare serum gonadotrophin production.;Allen;Nature (Lond.),1969b
3. Allen , W.R. 1970a Equine Gonadotrophins.
4. Endocrinology of early pregnancy in the mare.;Allen;Equine Vet. J.,1970b
5. The influence of fetal genotype upon endometrial cup development and PMSG and progestagen production in equids.;Allen;J. Reprod. Fertit.,1975a