00535cam a22001337a 4500 180718b1982 xxu||||| |||| 00| 0 eng d O91 M664 Minimal national standards caustic soda (mercury cell) industry by Central Pollution Control Board Delhi Central Board for the Prevention & Central of Water Pollution 1982 19p. Comprehensive Industry Document Series: Coinds/6/1981-82 Caustic soda industries - standards Central Pollution Control Board 492201 492201 0 0 0 0 IIPA IIPA 2018-08-04 O91 M664 GR15294 2018-08-04 2018-08-04 GR