1. The National Data Book;Statistical abstract of the United States,1990
2. Prevalence and significance of prescription medication usage among gerodontic patients;Nelson;Gerodontology,1987
3. FDA’s bimonthly update;Pharm Times,1992
4. The prevalence of drug therapy amongst dental patients;Barclay;NZ Dent J,1973
5. Medications and health histories: a survey of 4,365 dental patients;Cottone;JADA,1979