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[1155] Bertrand, Soc. méd. de Bologne, 1839.
[1156] Bergmann, Korrespondenzbl. d. deutsch. Ges. f. Psych., Neuwied, 1859.
[1157] Vesescu, Riv. stiintelor med., February, 1906.
[1158] Köhler, Monatsschr. f. Ohrenheilk., 1885.
[1159] Quintano, see Seifert, loc. cit.
[1160] Lesbini, La Argent. Med., 1905.
[1161] Henneberg, Berl. med. Ges., February 18, 1903.
[1162] Kayser, Klin. Monatsbl. f. Augenheilk., 1905.
[1163] Schultz-Zeyden, Berl. klin. Wochenschr., 1906.