PT - JOURNAL ARTICLE AU - John M. Henderson TI - Looking Back to Mackenzie DP - 1964 Jan 01 TA - The Journal of the College of General Practitioners PG - 8.2--23 VI - 7 IP - 1 4099 - http://bjgp.org/content/7/1/8.2.short 4100 - http://bjgp.org/content/7/1/8.2.full SO - J Coll Gen Pract1964 Jan 01; 7