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- [4] SEWAGE-TREATMENT AND ELECTRICAL INSTALLATIONS AT THE MAIN SEWAGE-TREATMENT PLANT OF VIENNA ELIN ZEITSCHRIFT, 1980, 32 (3-4): : 60 - 67
- [6] NATURAL SEWAGE-TREATMENT ZEITSCHRIFT FUR KULTURTECHNIK UND FLURBEREINIGUNG, 1981, 22 (03): : 180 - 189