Cincinnati, Ohio : Environmental Protection Agency, Office of Research and Development, Municipal Environmental Research Laboratory ; Springfield, Va. : for sale by the National Technical Information Service, 1977
xii, 182 pages : illustrations, graphs, maps ; 28 cm
OCLC
ocm03313108
Prepared by the Johns Hopkins University, School of Hygiene and Public Health, Department of Environment Health, Baltimore, Maryland, under Grant no. R 802709.