https://uomosul.edu.iq/libcentral/%d8%a7%d9%84%d8%af%d9%83%d8%aa%d9%88%d8%b1-%d8%a7%d9%84%d9%85%d8%aa%d9%85%d8%b1%d8%b3-%d9%87%d8%a7%d8%b4%d9%85-%d8%a7%d9%84%d9%85%d9%84%d8%a7%d8%ad-%d9%8a%d9%87%d8%af%d9%8a-%d8%a7%d9%84%d9%85%d9%83/