Exterior and constitutional features of first-calf cows of black-and-white cattle of different genotypesOrest Basonov, Dmitry Petrov, Amanbai Karynbaev, Zaurbek Aisanov and Tsrai KagermazovE3S Web Conf., 262 (2021) 02017DOI: https://doi.org/10.1051/e3sconf/202126202017