BUREAU OF INDIAN STA AMENDMENT NO 3 APRIL 2005 TO IS 1891 (PART 3) : 1988. SPECIFICATION FOR RUBBER CONVEYOR AND ELEVATOR - 2nd rev ed. 2005 - NEW DELHI BUREAU OF INDIAN STANDARDS. - 3 Subjects--Topical Terms: RUBBER CONVEYOR AND ELEVATOR TEXTILE BELTING Dewey Class. No.: 621 / BUR