Foaling and gestation period of Soviet Draft mares
Trud. gorjkovsk. sel.-hoz. Inst. 9: 224-232
Conclusions were reached after studying the State Stud Books for Brabancons and Soviet Drafts, the records of the Pochinkov Stud and the literature. The foaling rate for Soviet Draft mares was 81% v. 95% for Orlov Trotters.