Multinational impact of the 1968 Hong Kong Influenza pandemic: Evidence for a smoldering pandemic. Fifty Years of influenza A(H3N2) following the pandemic of 1968. Mass mortality among European common terns in South Africa in April–May 1961. (Ed.), Diseases of poultry (6th ed.), Iowa State University Press, Ames (1972), pp. Hanson (Ed.), Newcastle disease virus: an evolving pathogen, University of Wisconsin Press, Madison (1964), pp. (1949) Eine Variante des Virus der Geflügelpest in Bayern.
Emergence and pandemic potential of swine-origin H1N1 influenza virus. The development of the virus concept as reflected in corpora of studies on individual pathogens. World Organization for Animal Health :1-26. Avian Influenza (including infection with high pathogenicity avian influenza viruses).
