00936nam a2200205 i 4500000000074727CaOOAMICUS20030923135834.0030923s1930 xx 000 b eng cPUGita438 PTritton, Arthur Stanley.(OLS)http://pug/name/18439The caliphs and their non-Muslim subjects :a critical study of the covenant of 'Umar /Arthur Stanley Tritton.Oxford :University Press,1930.240 p. ;22 cmIslam. Storia islamicaI primi quattro califfi.(OLS)http://pug/subject/30409PUGPUG1Magazzino4Mag. 438 P 11589752 117807PUGBibl2117807 112574 2084438 P(OLS)http://pug/classification/4078245The caliphs and their non-Muslim subjects :a critical study of the covenant of 'Umar(OLS)http://pug/title/28883