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John G.J.G.GruhnJohn G.J.G., Lawrence M.L.M.RothLawrence M.L.M., History of Gynecological Pathology V. Dr. Walter Schiller, „Int J Gynecol Pathol”, 17 (4), 1998, s. 380–386, DOI: 10.1097/00004347-199810000-00015, PMID: 9785142.