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The edge of utility: slaves and smallpox in the early eighteenth century.
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| Formato: | Texto |
| Lenguaje: | English |
| Publicado: |
1985
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| Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1139481/ https://www.ncbi.nlm.nih.gov/pubmed/3883084 |