PT - JOURNAL ARTICLE ED - , TI - Editorial: The oral contraception study and collective research in general practice. DP - 1974 May 01 TA - The Journal of the Royal College of General Practitioners PG - 297--298 VI - 24 IP - 142 4099 - http://bjgp.org/content/24/142/297.short 4100 - http://bjgp.org/content/24/142/297.full SO - J R Coll Gen Pract1974 May 01; 24