R. H. Al-Obaidi and H. R. A. Al-Janabi 2025. PROLACTIN AND RECEPTOR GENE POLYMORPHISM AND THEIR ASSOCIATION WITH SOME PRODUCTIVE TRAITS OF HOLSTEIN COWS. IRAQI JOURNAL OF AGRICULTURAL SCIENCES. 56, 4 (Aug. 2025), 1305–1315. DOI:https://doi.org/10.36103/r2pc7s61.