Nehls, Gerhard. Islam, basic aspects : as it sees itself, as others see it, as it is : a teachers' textbook / Gerhard Nehls and Walter Erick. - Nairobi : Life Challenge Africa, c2009. - 247 p. : ill., maps ; 20 cm. Includes bibliographical references and index. LC Class. No.: BP161.2 / .N45 2009