American Water Works Association & ebrary, Inc. (2006). Waterborne pathogens (2nd ed.). American Water Works Association.

American Water Works Association and Inc ebrary. Waterborne Pathogens. 2nd ed. Denver, Colo.: American Water Works Association, 2006.

American Water Works Association and Inc ebrary. Waterborne Pathogens. 2nd ed. American Water Works Association, 2006.