1. The Edinburgh hospitals;Scott, R.; Gilmore, H.,1966
2. General practice in south west England;Wright, H.J.,1968
3. Referral to hospital by general practitioners. 7 R Coll Gen Pract;Morrell, D.C.; Gage, H.G.; Robinson, N.A.,1971
4. Do general practitioners have different referral thresholds?] R Coll Gen Pract;Cumins, R.; Jarman, B.; White, P.,1981
5. Explaining variation in general practitioner referrals to hospital. Fam Prac;Wilkin, D.; Smith, A.,1987