http://ehp.niehs.nih.gov/docs/2005/8115/abstract.html
A Randomized Controlled Trial Assessing Infectious Disease Risks from Bathing in Fresh Recreational Waters in Relation to the Concentration of Escherichia coli, Intestinal Enterococci, Clostridium perfringens, and Somatic Coliphages
Albrecht Wiedenmann, Petra Krüger, Klaus Dietz, Juan M. López-Pila, Regine Szewzyk, and Konrad Botzenhart
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