"Sewage Purification." . . . . "Water Pollution Congresses." . . "USA-USSR Symposium on Physical-Chemical Treatment from Municipal and Industrial Sources (2nd : 1975 : Cincinnati, Ohio)" . . . "Symposium on Physical-Chemical Treatment from Municipal and Industrial Sources (2nd : 1975 : Taft Center)" . . . "Sewage disposal Congresses." . . "Factory and trade waste Research Congresses." . . "USA-USSR Working Group on the Prevention of Water Pollution from Municipal and Industrial Sources." . . "Refuse and refuse disposal Congresses." . . "Sewage disposal." . . "Sewage Purification Congresses." . . . . . . . "Conference papers and proceedings" . "Conference papers and proceedings"@en . . . . . "Symposium on Physical-Chemical Treatment from Municipal and Industrial Sources Taft Center, Cincinnati, Ohio, November 12-14, 1975"@en . . . . . . . . . . . . . . . . . . . . . . . . "Symposium on Physical-Chemical Treatment from Municipal and Industrial Sources, Taft Center, Cincinnati, Ohio, November 12-14, 1975" . . "Symposium on Physical-Chemical Treatment from Municipal and Industrial Sources : Taft Center, Cincinnati, Ohio, November 12-14, 1975" . . . . . . "Conference proceedings" . "Refuse and refuse disposal." . . "United States. Environmental Protection Agency." . . "Water Pollution." . . "Factory and trade waste Research." . .