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2. Payne LN.Lymphoid leukosis. Poultry International 37¡G31¡V31. 1998.
3. Venugopal K,Howes K,Barrron GS,Payne LN.Recombinant envgp85 of HPRS¡V103 ( subgroup J ) Avian leukosis virusantigenic characteristics and usefulness as a diagnostic reagent. Avian Diseases 41¡G283¡V388. 1997.
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