WASET
    Eman. K. Ramadan and  Abdelgawad. S. El-Tahawy,  Effect of Calving Season on the Economic and Production Efficiency of Dairy Production Breeds.   journal   = {International Journal of Animal and Veterinary Sciences}, [online]. World Academy of Science, Engineering and Technology.
    August 2014, vol. 91(7). 798 - 802
    [viewed 09 May 2024]. Available from: https://publications.waset.org/pdf/10002288.