https://uomosul.edu.iq/libcentral/%d9%81%d9%8a-%d8%a7%d9%84%d9%8a%d9%88%d9%85-%d8%a7%d9%84%d8%b9%d8%a7%d9%84%d9%85%d9%8a-%d9%84%d8%ad%d8%b1%d9%8a%d8%a9-%d8%a7%d9%84%d8%b5%d8%ad%d8%a7%d9%81%d8%a9-%d8%a7%d9%84%d9%8a%d9%88%d9%86%d8%b3/