" Reviewed Work:Hadrat Abu Bakr, the First Caliph of Islamby Nawab Sadr Yar Jung Bahadar Maulvi Muhammad Habibur Rahman Khan Sherwani, Syed Moinul Haq " Nawab Sadr Yar Jung Bahadar Maulvi Muhammad Habibur Rahman Khan Sherwani and Syed Moinul Haq