%0 Journal Article %A C. M. Drillien %T Studies in mental handicap. II. Some obstetric factors of possible aetiological significance. %D 1968 %R 10.1136/adc.43.229.283 %J Archives of Disease in Childhood %P 283-294 %V 43 %N 229 %U https://adc.bmj.com/content/archdischild/43/229/283.full.pdf