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by Averroes; Butterworth, Charles E.
by Alfarabi; Butterworth, Charles E.
by Rousseau, Jean-Jacques; Butterworth, Charles E.
by Edited by Charles E. Butterworth , I. William Zartman
by Alfarabi; Mahdi, Muhsin; Mahdi, Muhsin; et al.
by Farabi; Butterworth, Charles E.
by Alfarabi; Butterworth, Charles E.; Butterworth, Charles E. (CON)
by Mahdi, Muhsin; Butterworth, Charles E.