Studies on recent virus field variant isolates: 3. Immunogenicity of this variant strain compared with a classical strain in broiler chickens.

Citation:
Studies on recent virus field variant isolates: 3. Immunogenicity of this variant strain compared with a classical strain in broiler chickens. , Nassef, S. A., Elham El-Ebiary A., K.M. Shaban, and Amer M. M. , Assiut Vet. Med. J. , Volume 51, Issue 107, p. 321-335, (2005)
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