1. Anonymous (1989) Local drag formularies: are they worth the effort? Drug Ther Bull 27:13–16
2. Beardon PHG, Brown SV, Mowat DAE, et al. (1987) Introducing a drug formulary to general practice: effects on prescribing costs. J R Coll Gen Pract 37:305–307
3. Field J, Freeman GK (1987) Ten years’ prescribing costs at Aldermoor Health Centre. Practitioner 231:701–704
4. Grant GB, Gregory DA, van Zwanenberg TD (1985) Development of a limited formulary for general practice. Lancet 1:1030–1032
5. Grant GB, Gregory DA, van Zwanenberg TD (1987) A basic formulary for general practice. Oxford University Press, Oxford