RT Journal Article SR Electronic T1 A Simple System for Monitoring Child Immunization 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 461 OP 463 VO 33 IS 252 A1 Godfrey, Peter YR 1983 UL http://bjgp.org/content/33/252/461.2.abstract AB