Weissleder, Wolfgang . The nomadic alternative : modes and models of interaction in the African-Asian deserts and steppes / edited by Wolfgang Weissleder. - Chicago : Mouton , 1978. - 423p. : figures ; 22cm . Includes index ISBN: Rs. 68.00 (Hb) Subjects--Index Terms: SOCIAL SCIENCES Dewey Class. No.: 306 / NULL