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2. Squamous cell epitheloma of the lip: A study of 576 cases;Broders;J.A.M.A.,1920
3. The grading of carcinoma;Broders;Minnesota Med.,1925
4. The gliomas of the central nervous system. A study of 210 verified cases.;Elvidge,1935
5. The Microscopic Anatomy of Tumors of the Central and Periperal Nervous System,;Hortega,1962