1. “Living Water”, Water Conditioning & Purification, November, 1994
2. “Facing World Water Disinfection Challenges”;Singer;Water Technology,1994
3. United States Environmental Protection Agency, The Safe Drinking Water Act, June, 1993
4. Anthony A. Rutkowski, PhD, “Cryptosporidium, A Versatile, Complex Organism”, Water Conditioning & Purification, June, 1993.
5. EPA, Safe Drinking Water Act Reauthorization Overview, February, 1994