Ma`alim al-hayat al-ijtima`iyyah wa-atharuha fi al-Maghrib al-'Aqsa fi `asr al-Muwahhidin (541 - 688 lil-hijrah / 1146 - 1269 M) dirasah tarikhiyah tahliliyah - El-Abbar, Najat Emraga Belhamad