Pence, Mel, Doug Ensley, Roy Berghaus, Johnny Rossi, Tim Wilson, and Patsie T. Cannon. 2007. “Improving Reproductive Efficiency through the Use of Reproductive Tract Scoring in a Group of Beef Replacement Heifers”. The Bovine Practitioner 41 (1):35-40. https://doi.org/10.21423/bovine-vol41no1p35-40.