1. Anonymous (1988) E.F. Kaleta & U. Heffels-Redmann (Eds.)Proceedings of the First International Symposium on Infectious BronchitisJune Rauischholzhausen Germany 9 345
2. Anonymous (1991) E.F. Kaleta & U. Heffels-Redmann (Eds.)Proceedings of the Second International Symposium on Infectious BronchitisJune Rauischholzhausen Germany 1 315
3. Anonymous (1998) E.F. Kaleta & U. Heffels-Redmann (Eds.)Proceedings of the International Symposium on Infectious Bronchitis June and Pneumovirus Infections in Poultry149 380 Rauischholzhausen Germany
4. Anonymous (2003)Proceedings of the XIII International Congress of the World Veterinary Poultry AssociationJulyDenverColorado USA 35 214
5. A Filterable Virus, Distinct from that of Laryngotracheitis, the Cause of a Respiratory Disease of Chicks