TY - JOUR T1 - British Births 1970 JF - The Journal of the Royal College of General Practitioners JO - J R Coll Gen Pract SP - 680 LP - 681 VL - 26 IS - 170 AU - P. O'Brien Y1 - 1976/09/01 UR - http://bjgp.org/content/26/170/680.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -