creator Schwab, Glenn Orville 1919- text New York Wiley c1981 3d ed. monographic xv, 525 p. : ill. ; 24 cm. Glenn O. Schwab ... [et al.]. Previous 2 editions published in 1955 and 1966 entered under R. K. Frevert. Includes bibliographies and index. Soil conservation Water conservation Agricultural engineering S623 .F68 1981 631.4 Frevert, Richard K. 0471030783 80027961 http://www.loc.gov/catdir/enhancements/fy0607/80027961-d.html http://www.loc.gov/catdir/enhancements/fy0607/80027961-t.html http://www.loc.gov/catdir/enhancements/fy0607/80027961-d.html http://www.loc.gov/catdir/enhancements/fy0607/80027961-t.html UOEL 000 20250428150510.0 2299653