Blanchard , T.L., Brinsko , S.P., Varner , D.D., Love , C.C., O’Meara , A. and Ramsey , J. 2010. Relationships between stallion age, book size, number of matings (covers), breeding soundness examination findings, and fertility parameters in 15 Thoroughbred stallions (34 stallion years). Clinical Theriogenology. 2, 2 (Apr. 2010), 91-97. DOI:https://doi.org/10.58292/CT.v2.11334.