RT Journal Article SR Electronic T1 Record linkage in automated systems JF The Journal of the Royal College of General Practitioners JO J R Coll Gen Pract FD British Journal of General Practice SP 325 OP 326 VO 31 IS 227 A1 Crombie, D. L. YR 1981 UL http://bjgp.org/content/31/227/325.abstract AB