PT - JOURNAL ARTICLE AU - B. E. Heard TI - Early pathological changes in chronic bronchitis. DP - 1966 Mar 01 TA - The Journal of the College of General Practitioners PG - 17--20 VI - 11 IP - Suppl 2 4099 - http://bjgp.org/content/11/Suppl_2/17.short 4100 - http://bjgp.org/content/11/Suppl_2/17.full SO - J Coll Gen Pract1966 Mar 01; 11