共 19 条
[14]
STAGNO S, 1982, Clinical Obstetrics and Gynecology, V25, P563, DOI 10.1097/00003081-198209000-00014
[15]
INFECTIONS IN PRESCHOOL-CHILDREN IN GROUP DAY-CARE
[J].
ACTA PAEDIATRICA SCANDINAVICA,
1976, 65 (04)
:455-463
[17]
TABER LH, 1985, J INFECT DIS, V151, P948, DOI 10.1093/infdis/151.5.948
[19]
1985, SAS USERS GUIDE STAT