RT Journal Article SR Electronic T1 CLASSIFYING DISEASE IN GENERAL PRACTICE JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 798 OP 799 VO 23 IS 136 A1 Keele, G. YR 1973 UL http://bjgp.org/content/23/136/798.3.abstract AB