PT - JOURNAL ARTICLE AU - P. O'Brien TI - British births—1970 DP - 1970 Mar 01 TA - The Journal of the Royal College of General Practitioners PG - 174--175 VI - 19 IP - 92 4099 - http://bjgp.org/content/19/92/174.short 4100 - http://bjgp.org/content/19/92/174.full SO - J R Coll Gen Pract1970 Mar 01; 19