https://uomosul.edu.iq/libcentral/%d8%a7%d9%84%d8%af%d9%83%d8%aa%d9%88%d8%b1-%d8%b7%d9%87-%d8%a7%d9%84%d8%b2%d8%a8%d9%8a%d8%af%d9%8a-%d9%8a%d9%87%d8%af%d9%8a-%d8%a7%d9%84%d9%85%d9%83%d8%aa%d8%a8%d8%a9-%d9%83%d8%aa%d8%a7%d8%a8-%d9%85/