Controlling seepage losses from irrigation canals; world-wide survey, 1967. - New Delhi [1968] - vii, 100 p. illus. 26 cm. Bibliography: p. 82-88. LCCN: sa 68013005 Subjects--Topical Terms: Irrigation canals and flumes--Linings. LC Class. No.: TC930 / .I64 Dewey Class. No.: 627/.52