Diptheria [sic] : its nature, history, causes, prevention, and treatment on hygienic principles : with a resumé of the various theories and practices of the medical profession / by R.T. Trall.

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Diptheria [sic] : its nature, history, causes, prevention, and treatment on hygienic principles : with a resumé of the various theories and practices of the medical profession / by R.T. Trall. Public Domain Mark. Source: Wellcome Collection.

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