共 9 条
[1]
BOYD C, 1982, BRIT WAY BIRTH
[2]
BRACKEN MB, 1981, OBSTET GYNECOL, V58, P336
[5]
MANTEL N, 1959, JNCI-J NATL CANCER I, V22, P710
[6]
MITCHELL AA, 1981, JAMA-J AM MED ASSOC, V245, P2311
[7]
PICKARD BM, 1982, BRIT MED J, V285, P889
[8]
SAXEN I, 1975, BRIT J PREV SOC MED, V29, P103
[9]
1983, BR MED J, V286, P1981