Crone, Patricia, 1945-2015. Hagarism : the making of the Islamic world / Patricia Crone, Michael Cook. - Cambridge : New York : Cambridge University Press, 1977. - ix, 268 p. ; 23 cm. Includes bibliographical references(p.237-258) and index. ISBN: 0521211336 LCCN: 75041714 Subjects--Topical Terms: Islam--History. LC Class. No.: BP55 / .C76 Dewey Class. No.: 909/.09/7671