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- [2] TURNING COLLIERY WASTE INTO SALABLE PRODUCTS TRANSACTIONS OF THE INSTITUTION OF MINING AND METALLURGY SECTION A-MINING INDUSTRY, 1990, 99 : A133 - A137
- [3] Cutting-edge methods convert waste into salable products HYDROCARBON PROCESSING, 2007, 86 (06): : 79 - +
- [4] RECOVERING ACID AND SALABLE FERROUS SULFATE FROM WASTE PICKLE LIQUOR METAL PROGRESS, 1970, 98 (06): : 58 - &
- [8] Ciech recovers by-products from production processes PRZEMYSL CHEMICZNY, 2023, 102 (10): : 979 - 979