Não informado. (1966). Gastroenterology abstracts and citations. National Institute of Arthritis, Metabolism and Digestive Diseases.
Chicago-referens (17:e uppl.)Não informado. Gastroenterology Abstracts and Citations. Bethesda, Md: National Institute of Arthritis, Metabolism and Digestive Diseases, 1966.
MLA-referens (8:e uppl.)Não informado. Gastroenterology Abstracts and Citations. National Institute of Arthritis, Metabolism and Digestive Diseases, 1966.
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