共 32 条
[1]
ATKINSON SM, 1972, OBSTET GYNECOL, V39, P759
[4]
DOYLE JC, 1953, JAMA-J AM MED ASSOC, V151, P360
[6]
Fleiss JL, 1973, STATISTICAL METHODS, P162
[7]
LARNED D, 1974, NEW TIMES, V2, P35
[8]
LAROS RK, 1975, OBSTET GYNECOL, V46, P215