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  1. By: Alberta Environmental Centre. - Alberta. Alberta Environment. Standards and Approvals Division.
    Publication info: [Vegreville, Alta.] :The Centre,1987.
    Holding Institution: University of Alberta Libraries (archive.org)
    Subjects: Alum  Aluminum hydroxide  Aluminum sulfate  Color removal  Effect of water pollution on  Fishes  Purification  Toxicology  Water  
  2. By: Bahls, Loren L. - Montana. Water Quality Bureau.
    Publication info: Helena, Mont. :Water Quality Bureau, Environmental Sciences Division, Dept. of Health and Environmental Sciences,[1985]
    Holding Institution: Montana State Library (archive.org)
    Subjects: Benthic animals  Diatoms  Effluent quality  Environmental aspects  Montana  Physiological effect  Pollution  Purification  Rosebud County  Sewage  Water  Water quality  
  3. By: Mark E. Taylor & Associates. - Ontario. Ministry of the Environment. - Metropolitan Toronto and Region Conservation Authority.
    Publication info: Toronto, Ont. :Mark E. Taylor & Associates,1992.
    Holding Institution: Ontario Ministry of the Environment (archive.org)
    Subjects: Biological treatment  Constructed wetlands  Function  Ontario  Purification  Sewage  Sewage lagoons  Storm sewers  Storm water retention basins  Urban runoff  Water  Water quality management  Wetlands  
  4. By: Stein, Otto. - Biederman, J. A. - Hook, P. B. - Allen, W. C. - Montana University System. Water Resources Center.
    Publication info: Bozeman, Mont. :Montana University System, Water Resources Center,1996.
    Holding Institution: Montana State Library (archive.org)
    Subjects: Constructed wetlands  Montana  Purification  Research  Water  Water resources development  Wetland planting  Wetlands  
  5. By: Kellerman, Karl F. - Kimberly, A. Elliott (Albert Elliott) - Pratt, R. Winthrop (Robert Winthrop) - United States. Bureau of Plant Industry. - United States. Department of Agriculture. - United States. Government Printing Office.
    Publication info: Washington, D.C. :G.P.O.,1907.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Pollution  Purification  Sewage  Sewerage  Water  
  6. By: Prescott, Samuel Cate, - Winslow, C.-E. A. (Charles-Edward Amory),
    Edition: 2d ed., rewritten. 1st thousand.
    Publication info: New York,1908.
    Holding Institution: Cornell University Library
    Subjects: Bacteriology  Purification  Water
  7. By: Moore, George Thomas, - Kellerman, Karl F.
    Publication info: Washington :Gov't print. off.,1904.
    Holding Institution: University of California Libraries (archive.org)
    Subjects: Algicides  Fungicides  Purification  Water  
  8. By: Eby, Harry J. - Hsingh, V. P.
    Publication info: Washington, D.C. :Agricultural Research Service, U.S. Dept. of Agriculture,1972.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Biological treatment  Cyanobacteria  Purification  Sewage  Sewage lagoons  
  9. By: California. Dept. of Water Resources. - Brown, Randall L.
    Publication info: Sacramento];For sale by the Supt. of Docs., U.S. Govt. Print. Off., Washington,1971.
    Holding Institution: University of California Libraries (archive.org)
    Subjects: Algae  Biological treatment  Nitrates  Nitrogen removal  Purification  Water  
  10. By: California. Dept. of Water Resources. - United States. Environmental Protection Agency. - United States. Bureau of Reclamation.
    Publication info: Washington,For sale by the Supt. of Docs., U.S. Govt. Print. Off.,1971.
    Holding Institution: University of California Libraries (archive.org)
    Subjects: Algae  Biological treatment  Nitrates  Purification  Water  
  11. By: Moore, J. W. - Alberta Environmental Centre.
    Publication info: Vegreville, AB :Alberta Environmental Centre,1992.
    Holding Institution: University of Alberta Libraries (archive.org)
    Subjects: Environmental aspects  Industries  Purification  Sewage  Wastewater treatment  Wastewater treatment facilities  
  1. By: OLIVEIRA,STÉLIO R.M. - NASCIMENTO,ANTONIA E. - LIMA,MARIA E.P. - LEITE,YÁSKARA F.M.M. - BENEVIDES,NORMA M.B.
    Type: Article
    In: Sociedade Botânica de São Paulo
    Publication info: Sociedade Botânica de São Paulo
    Subjects: Agglutinin  Algae  lectin  Pterocladiella capillacea  Purification
  2. By: Borghetti,Fabian - Lima,Elisa Coutinho de - Silva,Lucas de Carvalho Ramos
    Type: Article
    In: Acta Botanica Brasilica
    Date: 2013-03-01
    Subjects: allelopathy  Cerrado  freeze-drying  leaf extract  Purification