Walker, Wynn R. Guidelines for designing and evaluating surface irrigation systems / by W.R. Walker. - Rome : Food and Agriculture Organization of the United Nations, 1989. - xi, 137 p. ; 30 cm. - FAO irrigation and drainage paper ; 45 . Includes bibliographical references (p. 133-135) ISBN: 9251028796 Subjects--Topical Terms: Irrigation engineering. Gardens -- Irrigation -- Evaluation. Dewey Class. No.: 627.52