1. HORN, R.J. “Ozone plant design and operation to achieve treatment performance standards - Bristol Water's Experience”. presented at Intl. Ozone Assoc., European-African Group Symposium. December 2/3, London. Session 7
2. STOLARIK, G.F. “Ozonation and the direct filtration process”. American Water Works Association, California - Nevada Section, Fall Conf. Oct. 28-30, Palm Springs, CA.