Schwab, Glenn Orville. Soil and water conservation engineering - 2 ed. - New York : Wiley, 1966 - 683 p. : ilus. - The Ferguson Foundation agricultural engineering series . - The Ferguson Foundation agricultural engineering series . LCCN: 57062 Subjects--Topical Terms: Agua--Conservacion.Suelos--Conservación. Dewey Class. No.: 631.45 / S2 1966