Standard methods for the examination of water and wastewater - Eaton, Andrew D.; Clesceri, Lenore S.; Greenberg, Arnold E.; Franson, M. A. H.; Franson, Mary Ann H.; Clesseri, Lenore S.; Eaton, Andrew E.; Clesceri, Lenore S; Greenberg, Arnold E; Eaton, Andrew D (American Public Health Association, 1998)