[128] Amer. Jour. Obstetrics and Diseases of Women and Children, lxix, 6.

[129] Obstetrics, 4th ed. New York, 1917.

[130] Jour. Amer. Med. Assoc., June 2, 1917.

[131] Jour. Amer. Med. Assoc., April 10, 1915.

[132] Diseases of the Heart. New York, 1905.

[133] Medizin. Klinik, February 25, 1912.

[134] Jour. Amer. Med. Assoc., lxix, 24.

[135] Loc. cit.

[136] Philadelphia, 1913.

[137] Zeitschr. f. Geburtshülfe u. Gynäk., lxxvi, 3, p. 677. Stuttgart.