PT - JOURNAL ARTICLE AU - D. L. Crombie AU - R. J. Pinsent AU - P. M. Lambert AU - D. Birch TI - Comparison of the first and second national morbidity surveys. DP - 1975 Dec 01 TA - The Journal of the Royal College of General Practitioners PG - 874--878 VI - 25 IP - 161 4099 - http://bjgp.org/content/25/161/874.short 4100 - http://bjgp.org/content/25/161/874.full SO - J R Coll Gen Pract1975 Dec 01; 25