https://uomosul.edu.iq/libcentral/%d8%a7%d9%84%d8%b3%d9%8a%d8%af-%d8%b9%d8%a8%d8%af%d8%a7%d9%84%d9%84%d9%87-%d8%ad%d8%b3%d9%86-%d9%8a%d9%87%d8%af%d9%8a-%d8%a7%d9%84%d9%85%d9%83%d8%aa%d8%a8%d8%a9-%d9%85%d8%ac%d9%85%d9%88%d8%b9%d8%a9/