1. American Association of Poison Control Centers regional-ization criteria;Vet Hum Toxicol,1978
2. 1980 Survey of Poison Control Centers;Shaeffer;Natl Clgh Poison Control Cent Bull,1982
3. A future direction for poison centers: A critique;Lovejoy;Pediatr Clin North Am,1970
4. Evaluation of regional and nonregional poison centers;Thompson;N Engl J Med,1983
5. 1983 Directory of United States Poison Control Centers and Services. U.S. Department of Health and Human Services, Food and Drug Administration. Office of Drugs, Poisoning Surveillance and Epidemiology Branch, Rockville, Maryland, pp 1–54.