Herrmann, J. A., and R. L. Wallace. “Effect of New and Reused CIDRs on Serum Progesterone Concentrations in Lactating Dairy Cows”. The Bovine Practitioner 41, no. 1 (March 1, 2007): 41–47. Accessed September 11, 2024. https://bovine-ojs-tamu.tdl.org/bovine/article/view/2874.