Soil and water conservation engineering / Richard K. Frevert...[et al.]. Frevert, Richard K. Soil conservation. Water conservation. S623 .F68 1955 631.45 FRS Prelim. ed. published in 1953 under title: Engineering in soil and water conservation. Includes bibliographical references and index. New York : Wiley, 1955. 1955. 1955 Text xiii, 479 p. : eng The Ferguson Foundation agricultural engineering series