Sleeping sickness in the island of Principe : sanitation, statistics, hospital services, and work of official conservancy brigade / by Bernardo F. Bruto da Costa ; translated by J.A. Wyllie.

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Sleeping sickness in the island of Principe : sanitation, statistics, hospital services, and work of official conservancy brigade / by Bernardo F. Bruto da Costa ; translated by J.A. Wyllie. In copyright. Source: Wellcome Collection.