Pollution control guidelines:bakeries - Central Environmental Authority Colombo 1997 - Sri Lanka Wastes Occupational Health Standards - Pollution control guidelines No.17 . Nat. Bib. No.: P 2619 Nat. Bib. Agency Control No.: 577.4(026)(548.7)POL Subjects--Topical Terms: Ecology Universal Decimal Class. No.: 577.4(026)(548.7) 1