共 5 条
[1]
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[2]
MEYER BENGT, 1955, ACTA OBSTET ET GYNECOL SCAND, V34, P189
[4]
Schrinsky D C, 1978, Obstet Gynecol Surv, V33, P217
[5]
SHAW WF, 1930, J OBSTET GYN BR EMP, V37, P72