Walker, Wynn R. Surface irrigation : theory and practice / Wynn R. Walker, Gaylor V. Skogerboe. - Englewood Cliffs, N.J. : Prentice-Hall, c1987. - xiii, 386 p. : ill. ISBN: 0138779295 Subjects--Topical Terms: Irrigation engineering. LC Class. No.: TC805 / .W35 1987 Dewey Class. No.: 631.5/87�19