Transactions of a special conference of state and territorial health officers with the United States Public Health Service, for the consideration of the prevention of the spread of poliomyelitis : Held at Washington, D.C., August 17 and 18, 1916.

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Transactions of a special conference of state and territorial health officers with the United States Public Health Service, for the consideration of the prevention of the spread of poliomyelitis : Held at Washington, D.C., August 17 and 18, 1916. Public Domain Mark. Source: Wellcome Collection.