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Lua i Stíl Chicago (17ú heag.)Barclay, A., R. Brady, S. Davis, agus G. Lange. CD4 and the Immunoglobulin Superfamily. 1993.
Lua MLA (9ú heag.)Barclay, A., et al. CD4 and the Immunoglobulin Superfamily. 1993.
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