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Letter from Leonidas H. Berry to Dr. Itaru Oi, Institute of Gastroenterology, Tokyo Women's College,

Tokyo, Japan, inviting him to write a monograph on "The Clinical Significance of Endoscopy of the Duodenum and the Hepato-Pancreatic Ducts" for a book sponsored by Roche Laboratories

Courtesy National Library of Medicine

Page with typewritten text.