Searching : fresh water : the human imperative. edited by C. Devendra - Ottawa, Ont. Canada : International Development Research Centre (IDRC) , 1989 - 40p. : ill. ; 25 cm. - IDRC (Series), 272e. . Includes bibliographical references. ISBN: 0889365466 Subjects--Topical Terms: Fresh waterWater Gov. Doc. Class. No.: XZ IDRC-27e