BUREAU OF INDIAN STANDARDS INDIAN STANDARD CANAL HEAD REGULATORS - CRITERIA FOR DESIGN IS 6531:1994 INDIAN STANDARD CANAL HEAD REGULATORS - CRITERIA FOR DESIGN IS 6531:1994 - - NEW DELHI BIS 1994 - 35 Subjects--Topical Terms: CIVIL IS 6531:1994 IS 7784:1996 Dewey Class. No.: 627.13 BIS / BUR