1. The influence of operating conditions of activated-sludge treatment on the behaviour of f2 coliphage;Balluz;J. Hyg. Camb.,1979
2. The behaviour of f2 coliphage in activated sludge treatment;Balluz;J. Hyg. Camb.,1978
3. The persistence of poliovirus in activated sludge treatment;Balluz;J. Hyg. Camb.,1977
4. Removal of viruses from sewage, effluents, and waters. 1. A review;Berg;Bull. Wld. Hlth. Org.,1973
5. Removal of viruses from sewage, effluents, and waters. 2. Present and future trends;Berg;Bull. Wld. Hlth. Org.,1973