Search Results for the EPA National Library Catalog

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Fixed-film biological processes for wastewater treatment 1983
Proceedings : First National Symposium / Workshop on Rotating Biological Contactor Technology held at Champion, Pennsylvania; February 4-6, 1980 1980
Proceedings : first National Symposium/Workshop on Rotating Biological Contactor Technology : held at Champion, Pennsylvania, February 4-6, 1980 / 1980
Proceedings-- first International Conference on Fixed-Film Biological Processes : April 20-23, 1982, Kings Island, Ohio / 1982
Use of extension education programs by farmers. 1992

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