共 36 条
[11]
GUTELIUS MF, 1977, PEDIATRICS, V60, P294
[12]
HAMILTON S G, 1956, Practitioner, V176, P79
[13]
JARVIS M, 1984, J EPIDEMIOL COMMUN H, V38, P335, DOI 10.1136/jech.38.4.335
[14]
KLEIN M, 1985, 31 ROYAL COLL GEN PR
[15]
LARSON CP, 1980, PEDIATRICS, V66, P191
[16]
Lovell A, 1987, Health Serv J, V97, P335
[17]
LOVELL A, 1986, ST THOMAS MATERNITY
[19]
MURRAY FA, 1974, HLTH SOC SERV J 0727, P1679
[20]
OAKLEY A, 1986, P329