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Dissertatio medica inaugralis de fabrica et usu linguæ, quam ... / ex auctoritate magnifici rectoris Adriani van Royen, ... nec non amplissimi senatus academici consensu, pro gradu doctoratus, summisque in medicina honoribus consequendis ; eruditorum examini submittit Joan Cornelissen den Ebo. Public Domain Mark. Source: Wellcome Collection.