Molecular evolution of influenza viruses. A viruses of H5 and H7 subtypes. Wood GW, McCauley JW, et.al. Another good site. WWW Virtual Library , Virology.
Virus databases on-line .
WWW Sites of Interest - another excellent site. Virology Information - Science. Org,a good reference site. Molecular Virology Medical Microbiology Home Page - a comprehensive list of links. Virus Reference Laboratory Communicable Disease Control, Surveillance and Other Resources Emerging Infections Information Network, Department of Epidemiology and Public Health,Yale University School of Medicine.