Q.Musurmonov, R.Pardayev, M.Ismatova, and S.Xamanova. “Productivity of Cows in the Experimental Group With Black-and-White and Its Crossbreeds With Holstein Bulls ”. Excellencia: International Multi-disciplinary Journal of Education (2994-9521) 1, no. 5 (November 27, 2023): 532–535. Accessed November 9, 2025. https://multijournals.org/index.php/excellencia-imje/article/view/151.