RT Journal Article SR Electronic T1 A ledger method of morbidity recording. JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 81 OP 82 VO 24 IS 138 A1 M. A. Basker YR 1974 UL http://bjgp.org/content/24/138/81.abstract AB