Becker, W. B. (1963). The morphology of tern virus. Virology 20, 318–27.
Becker, W. B. (1964 a). Étude morphologique du virus Tern. Nucléocapsides énantiomorphes. Annls Inst. Pasteur, Paris 106, 575–80.
Becker, W. B. (1964 b). Tern virus. M.D. Thesis, University of Cape Town.
Blaxland, J. D. (1951). Newcastle disease in shags and cormorants and its significance as a factor in the spread of this disease among domestic poultry. Vet. Rec. 63, 731–3.
Brandly, C. A., Moses, H. E., Jones, E. E. & Jungherr, E. L. (1946). Epizootiology of NDV in poultry. Am. J. vet. Res. 7, 243–9.
Dinter, Z. (1964). Avian myxoviruses. In Newcastle Disease Virus: An Evolving Pathogen, pp. 299–312. Ed. Hanson, R. P.. The University of Wisconsin Press.
Dulbecco, R. (1952). Production of plaques in monolayer tissue cultures by single particles of an animal virus. Proc. natn. Acad. Sci., U.S.A. 38, 747–52.
Fabiyi, A., Lief, F. S. & Henle, W. (1958). Antigenic analyses of influenza viruses by complement fixation. II. The production of antisera to strain-specific V antigens in guinea-pigs. J. Immun. 81, 467–77.
Hoyle, L. (1952). Structure on the influenza virus. The relation between biological activity and chemical structure of virus fractions. J. Hyg., Camb., 50, 229–45.
Joensen, A. H. (1959). Disaster among fulmars (Fulmaris glacialis) and kittiwakes (Rissa tridactyla) in Danish waters in 1959. Dansk Orn. Foren. Tidsskr. 55, 212–18.
Lief, F. S. & Henle, W. (1956 a). Studies on the soluble antigen of influenza virus. I. The release of S antigen from elementary bodies by treatment with ether. Virology 2, 753–71.
Lief, F. S. & Henle, W. (1956 b). Studies on the soluble antigen of influenza virus. II. A comparison of the effects of sonic vibration and ether treatment of elementary bodies. Virology 2, 772–81.
Lief, F. S., Fabiyi, A. A. & Henle, W. (1958). Antigenic analysis of influenza viruses by complement fixation. I. The production of antibodies to the soluble antigen in guinea-pigs. J. Immun. 80, 53–65.
Mayer, M. M., Osler, A. G., Bier, O. G. & Heidelberger, M. (1946). The activating effect of magnesium and other cations on the hemolytic function of complement. J. exp. Med. 84, 535–48.
Pereira, H. G., Tumova, B. & Law, V. G. (1965). Avian influenza A viruses. Communicable Disease Centre Zoonoses Surveillance, Report Number 5: Animal Influenza, pp. 26–31.
Porterfield, J. S. (1960). A simple plaque-inhibition test for the study of arthropod-borne viruses. Bull. Wld Hlth Org. 22, 373–80.
Reed, L. J. & Muench, H. (1938). A simple method of estimating fifty per cent end-points. Am. J. Hyg. 27, 493–7.
Richardson, G. M. (1941). Preservation of liquid complement. Lancet ii, 696–7.
Rowan, M. K. (1962). Mass mortality amongst European Common Terns in South Africa in April–May 1961. Br. Birds, 55, 103–14.
Stubbs, E. L. (1959). Diseases of Poultry, 4th ed., pp. 559–608. Ed. Biester, H. E. and de Vries, L.. Iowa State University Press.
Waterson, A. P., Hurrell, J. M. W. & Jensen, K. E. (1962). The fine structure of influenza A, B and C viruses. Arch. ges. Virusforsch. 12, 487–95.
Wells, R. J. H. (1963). An outbreak of fowl plague in turkeys. Vet. Rec. 75, 783–6.
W.H.O. (1959). Respiratory Virus Diseases. First report of the Expert Committee. Tech. Rep. Ser. Wld Hlth Org. no. 170.
Wilson, J. E. (1950). Vet. Rec. 62, 33. Quoted by Blaxland (1951).