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Akbaş A, Sari M, Usta Z, Saatci M. A Field Study on Fertility Traits of Holstein Heifer and Cows Artificially Inseminated with Sexed Belgian Blue Sperm and Growth Characteristics of Crossbreed Belgian Blue × Holstein (F1) Male Calves . C. R. Acad. Bulg. Sci. [Internet]. 2022 Jul. 29 [cited 2023 Mar. 26];75(7):1072-81. Available from: https://proceedings.bas.bg/index.php/cr/article/view/125