RT Article T1 The Ummah: An Analytic Approach JF Studia Islamica VO 10 SP 5 OP 22 A1 Nieuwenhuijze, Christoffel A. O. van 1920-2011 LA English PB Brill YR 1959 UL https://www.ixtheo.de/Record/1689100230 K1 Christianity K1 Communities K1 Humans K1 Islam K1 Osmosis K1 Reality K1 Segregation K1 Social Identity DO 10.2307/1595124