Sterility in the Cow: Some Observations on Causes of the Condition Most Frequently Encountered in the Practice of Veterinary Medicine
Tài liệu tham khảo
Nielsen, 1926
Quinlan, 1929
Pugh: “The Assumption of Male Characters by the Cow,” The Veterinary Journal, Vol. 82, 557–563.
Pugh, 1924, Veterinary Record, 4