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- [7] SECONDARY RAW-MATERIALS IN CHEMICAL-INDUSTRY - WASTES FROM MINING AND PROCESSING OF MINERAL RAW-MATERIALS PRZEMYSL CHEMICZNY, 1973, 52 (11): : 721 - 727
- [9] SOLID WASTES AS RAW-MATERIALS FOR CERAMIC PRODUCTS AMERICAN CERAMIC SOCIETY BULLETIN, 1972, 51 (09): : 728 - +
- [10] ROLE OF PLASTICS IN RECOVERY OF RAW-MATERIALS CHEMIE INGENIEUR TECHNIK, 1973, 45 (17) : 1085 - 1085