Alsop, Judith A Evolution of poison control centers in California. [electronic resource] - American journal of health-system pharmacy : AJHP : official journal of the American Society of Health-System Pharmacists Sep 2007 - 1898-9 p. digital Publication Type: Letter ISSN: 1535-2900 Standard No.: 10.2146/ajhp060494 doi Subjects--Topical Terms: CaliforniaPoison Control Centers--economics