“Effect of Sire, Dam, Parity and Year of Calving on Parameters and Characteristics of Lactation Curve of Friesian-Holstein Cows”. Comprehensive Journal of Science 10, no. ملحق 38 (January 12, 2026): 1872–1882. Accessed March 7, 2026. https://www.cjos.dtasd.com/index.php/journal/article/view/1311.