1. Evaluation of a modified-live virus vaccine administered in ovo to protect chickens against Newcastle disease;Ahmad;Am. J. Vet. Res.,1992
2. Separation of heterophils from blood using Ficoll/Hypaque discontinuous gradients;Andreasen;Avian Dis.,1989
3. Isolation and identification of Salmonella;Andrews,1978
4. Memorandum of evidence to the agriculture committee inquiry on Salmonella in eggs;Bartlett;Public Health Lab. Service Microbiol. Dig.,1989
5. Freshney, R. I., 1983. Culture of Animal Cells. Vol. 1. Alan R. Liss, New York, NY.