1. A comparison of costs and data quality of three health survey methods: mail, telephone and personal home interview;O'Toole, B.I.; Battistutta, D.; Long, A.; Crouch, K.;Am J Epidemiol,1986
2. Factors affecting response to postal questionnaires;Kaplan, S.; Cole, P.;Br _J Prev Soc Med,1970
3. An introduction to epidemiology;Alderson, M.,1983
4. The accuracy of agesex registers in general practice. _7 Roy Coll Gen Pract;Sheldon, M.G.; Rector, A.L.; Barnes, P.A.,1984
5. Accuracy of electoral registers and family practitioner committee lists for population studies of the very elderly;Bowling, A.; Hart, D.; Silman, A.;J Epidemiol Community Health,1989