na JATIM-06090000003063 20090625105828.0 ind 0010-060900000003063 0 297. 91 USM k USMAN, H. Zuber 0 Khalifah Pertama Abu Bakar Siddik Cet. 1 Jakarta Widjaya 1977 56 hlm. ; 21 cm 0 0 ABU BAKAR SIDDIK JIPDSUR 2 0