1. Duration of immunity in layers after the use of live- or killed-virus Newcastle disease vaccines;Dardiri;Am. J. Vet. Res.,1962
2. Susceptibility to Newcastle disease infection of chickens from hens immunized with live-virus vaccines;Doll;Am. J. Vet. Res.,1951
3. Vaccination for Newcastle disease in drinking water with LaSota strain in relation to dosage and revaccination with the homologous and heterologous strains;Grun;Poultry Sci.,1964
4. Immunogenicity of inactivated Newcastle disease virus preparations;Hofstad;Avian Dis.,1963
5. Effects of virucide beta-propiolactone and its degradation products on blood platelets;Kelly;Fed. Proc.,1952