Al–Taai, Suhaib. 2017. Histological Changes of the Gills of Carp Fish (Cyprinius Carpio) in Winter and Summer. المجلة الطبية البيطرية العراقية 40 (2), 20-25. http://jcovm.uobaghdad.edu.iq/index.php/Iraqijvm/article/view/106.