na INLIS000000000003309 Ind 0010-1118003309 626.81 Edward J. Vander Velde and Robert L. Johnson Tubewells in Pakistan distributary canal commands: Lagar distributary, lower chenab canal system, Punjab VANDER, Velde, E.J. Colombo IIMI 1992 vii, 44 p.: ill.; 28 cm.-- vii, 44 p.: ill.; 28 cm.-- IRRIGATION SURFACE WATER 956/MS/93