References
- Beck and Light (1938) Am. J. Obstr. and Gynaec., 35, p. 1028.
- Bjerre, H. (1940) Acta Obstr. et gynec. Scand., 47
- Brown, Webster and Dippel (1940) Bull. John Hopkins Hosp., 66
- Burke, F. J. (1935) J. Obstr. and Gynaec. Brit. Emp., 42, p. 1096.
- Carty, J. R. (1936) Am. J. of Roentg., 35
- Cetroni (1937) Clin, ostet., 39, p. 373.
- Erhardt, K. (1932) Klin. Wschr., pp. 332-333.
- Erhardt, K. (1932) Klin. Wschr., pp. 1830-1833.
- Erhardt, K. (1932) Zbl. f. Gynecol., pp. 847-851.
- Erhardt, K. (1939) Zbl. f. Gynecol., pp. 2335-2340.
- Frostad, H. (1940) Nord. Med., 2078
- Hall, Currin and Lynch (1937) Am. J. Obstr. and Gynaec., 33, p. 625.
- Jablonski, Kazimierz and Meisels (1938) Ginek. polska, 17, pp. 22-28.
- Kerb and Mackay (1933) Edinburgh M. J.
- Mackenzie, L. L. (1937) Am. J. Obstr. and Gynaec., 33, p. 577.
- Mabr, J. P. (1935) Am. J. Obstr. and Gynaec., 454
- Dowell, Mc (1937) Am. J. Obstr. and Gynaec., 33, p. 436.
- Menees, Miller and Holly (1930) Am. J. of Roentg., 24, pp. 363-366.
- Moloy, C. H. and Swensson, P. C. (1938) Nelson's loose leaf: Diagnostic Roentgenology
- Olsson, O. (1941) Acta Radiol., pp. 129-130.
- Petersen, E. (1938) Acta Obstr. et gynec. Scand., 18, pp. 275-284.
- Prentiss and Tucker (1939) Am. J. Obstr. and Gynaec., 37, pp. 777-787.
- Robecchi and Zocchi (1937) Atti Soc. ital. Ostetr., 33, pp. 715-720.
- Schenck, S. G. (1940) Am. J. of Roentg.
- Schinz, Baensch and Friedl (1939) Lehrbuch der Rontgendiagn.
- Schmidt, A. L. C. (1941) Nederl. Tijdschr. Verloskde, 43, pp. 254-263.
- Snow and Powell (1934) Am. J. of Roentg., 31, p. 37.
- Snow and Rosensohn (1939) Am. J. of Roentg.
- Ude, Weum and Urner (1934) Am. J. of Roentg., 31, p. 230.
- Ude and Urneb (1935) Am. J. Obstr. and Gynaec., 29, p. 667.
- Ude, Urner and Robbins (1938) Am. J. Roentg., 40, p. 37.