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Book, National Academy Press, Washington, USA
Textbook, K. Todar, University of Wisconsin, Madison, WI, USA
Journal, BioMed Central, London, UK
Journal, American Society for Microbiology, Washington, USA
Journal, American Society for Microbiology, Washington DC, USA
Book, The National Academies Press, Washington, USA
Journal, MeDitorial, Prague, Czech Republic, in Czech
Textbook, Committee on Indicators for Waterborne Pathogens, National Research Council, The National Academies Press, Washington, USA, 2004
Medvet, Underdale, Australia
J. A. Sullivan
Richard Hunt, University of South Carolina, USA
Textbook, Committee on Damp Indoor Spaces and Health, The National Academies Press, Washington, USA
Journal, DOAJ, Kastrup, Denmark
Johns Hopkins University, Baltimore, USA
Diosphere Ltd t/a Medical Images, Wilmington, USA