1. The presence of chronic respiratory disease in pipped eggs;Cover;Amer. J. Vet. Res.,1954
2. The propagation of a virus in embryonated chicken eggs causing chronic respiratory disease of chickens;Delaplane;Amer. J. Vet. Res.,1943
3. Studies on chronic respiratory disease of chickens. II. Isolation of a virus;Fahey;Canad. J. Comp. Med.,1954
4. Studies on chronic respiratory disease of chickens. III. Egg transmission of a pleuropneumonia-like organism;Fahey;Canad. J. Comp. Med.,1954
5. Fahey, J. E., and J. F. Crawley, 1954c. Unpublished observations.