Petra?kien?, Rasa, Nijol? Pe?iulaitien?, and Vigilijus Jukna. “Crossbreeding Influence on Age at First Calving and First Lactation Productivity in Lithuania Bred Dairy Cattle”. Cuban Journal of Agricultural Science 45, no. 3 (June 1, 2011). Accessed April 27, 2024. https://cjascience.com/index.php/CJAS/article/view/111.