00316nas a2200133   4500000000100000008004100001100001500042700001200057700002300069700001400092245006100106300000800167490000700175       1999                            d1 aRoberts C.1 aPeat B.1 aHenderson-Smart D.1 aAlgert C.00aSmall fetal size: a risk factor for breech birth at term  a1-80 v67