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VAILES, L. D., WASHBURN, S. P., & BRITT, J. H. (1992). EFFECTS OF VARIOUS STEROID MILIEUS OR PHYSIOLOGICAL STATES ON SEXUAL-BEHAVIOR OF HOLSTEIN COWS. JOURNAL OF ANIMAL SCIENCE, 70(7), 2094–2103. https://doi.org/10.2527/1992.7072094x

Vailes, L. D., & Britt, J. H. (1990). Influence of footing surface on mounting and other sexual behaviors of estrual Holstein cows. Journal of Animal Science, 68(8), 2333. https://doi.org/10.2527/1990.6882333x