RT Journal Article SR Electronic T1 Comparison of the first and second national morbidity surveys. JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 874 OP 878 VO 25 IS 161 A1 Crombie, D. L. A1 Pinsent, R. J. A1 Lambert, P. M. A1 Birch, D. YR 1975 UL http://bjgp.org/content/25/161/874.abstract AB