PT  - JOURNAL ARTICLE
AU  - Webb, D A
AU  - Culhane, J
TI  - Time of day variation in rates of obstetric intervention to assist in vaginal delivery
AID  - 10.1136/jech.56.8.577
DP  - 2002 Aug 01
TA  - Journal of Epidemiology and Community Health
PG  - 577--578
VI  - 56
IP  - 8
4099  - http://jech.bmj.com/content/56/8/577.short
4100  - http://jech.bmj.com/content/56/8/577.full
SO  - J Epidemiol Community Health2002 Aug 01; 56