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A review of:“Learning: a survey of psychological interpretations”. By WINFRED F. HrLL,(London: Methuen, 1972,)[Pp, xii+ 249,]£ 2· 00 (£ 0· 90 paperback)
ʿAbd Allah b. Jaʿfar al-Himyarı. Qurb al-isnad. Qumm: Muʾassasat al al-bayt ʿalayhim al-salam li-ih yaʾ al-turath, 1413/1992–93. Abual-Fawaris Ahmad b. Yaʿqub. The Political Doctrine of the Isma ʿı lıs (the Imamate). Edited and translated by Samı Nassıb Makarem. Delmar, NY: Caravan Books, 1977.