TY - JOUR AU - Roberts C. AU - Peat B. AU - Algert C. AU - Carnegie M. BT - Paediatric and Perinatal Epidemiology LA - eng LB - epidemiologyjournal PY - 2002 SP - 115 EP - 23 ST - Paediatr. Perinat. Epidemiol. T2 - Paediatric and Perinatal Epidemiology TI - Operative delivery during labour: trends and predictive factors VL - 16 ER -