1. US Environmental Protection Agency Purgeable Halocarbons, Method 601. 40 CFR 136.1 1982
2. Dressman , R.C. Total Organic Halide, Method 450.1-Interim Drinking Water Res. Div., USEPA, Cincinnati, Ohio 1980
3. US Environmental Protection Agency Methods for Chemical Analysis of Water and Wastes. EPA-600/4-79/020. Cincinnati, Ohio 1979
4. Gorman , G.W. Feeley , J.C. Procedure for the Recovery of Legionella From Waters: Developmental Method. Centers for Disease Control, Atlanta, Ga. 1982