Functional amenorrhea of Dietrich (Zentr. f. Gyn., 1916, No. 6), Siegel (Zentr. f. Gyn., 1917, No. 13-14), Eckstein (ibid.), Schweitzer (Münch. med. Woch., 1917, No. 17), Spaeth (Zentr. f. Gyn., 1917, No. 27) - PDF (Russian)
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