RT Journal Article SR Electronic T1 A PRACTICE OF OBSTETRICS AND GYNAECOLOGY JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 114 OP 114 VO 28 IS 187 A1 M. I. Cookson YR 1978 UL http://bjgp.org/content/28/187/114.2.abstract AB