共 12 条
[1]
Butler NR, 1963, PERINATAL MORTALITY
[2]
COOPLAND AT, 1977, CAN MED ASSOC J, V116, P999
[5]
GOODWIN JW, 1969, CAN MED ASSOC J, V101, P57
[7]
HOBEL CJ, 1973, AM J OBSTET GYNECOL, V117, P1
[8]
MORRISON I, 1979, OBSTET GYNECOL, V53, P362
[10]
NISWANDER KR, 1972, DHEW NIH73379 PUBL