Hansen, Vaughn E. Irrigation principles and practices / Vaughn E. Hansen, Orson W. Israelsen, Glen E. Stringham. - 4th ed. - New York : Wiley, c1980. - 417 p. : ill. Third ed. by O. W. Israelsen and V. E. Hansen. ISBN: 0471030589 Subjects--Topical Terms: Irrigation. Dewey Class. No.: 631.7