THE PREVALENCE AND RELATION OF OVINE PROGRESSIVE PNEUMONIA TO PASTEURELLA HAEMOLYTICA IN TWO FLOCKS OF SHEEP . Iraqi J. Vet. Med. [Internet]. 1988 Dec. 28 [cited 2024 Dec. 20];12(1):70-85. Available from: https://jcovm.uobaghdad.edu.iq/index.php/Iraqijvm/article/view/1686