共 14 条
- [1] BAGSHAWE KD, 1973, J OBSTET GYN BR COMM, V80, P461
- [2] BALTAZAR JC, 1976, B WORLD HEALTH ORGAN, V54, P523
- [3] CURRY SL, 1975, OBSTET GYNECOL, V45, P1
- [4] Fleiss JL., 1981, STAT METHODS RATES P, V2
- [5] LAVECCHIA C, 1985, AM J EPIDEMIOL, V121, P457
- [6] LLEWELLYN-JONES D, 1965, J Obstet Gynaecol Br Commonw, V72, P242
- [7] MANTEL N, 1959, J NATL CANCER I, V22, P719
- [8] MANTEL N, 1963, J AM STAT ASSOC, V58, P690