Bernfeld S. Muhammad is Muhammad. His life and religious teachings. In Russian (ask us if in doubt)./Bernfel'd S. Mukhamad t.e. Magomet. Ego zhizn' i religioznoe uchenie. Book 1 and 2. Text in Hebrew. Warsaw. Printing by M. I. Galter and Comp. 1898. 152 p. SKUalbbb696ad74672ba5c.