Toxicology
William C. Head, The DUI Book: A Citizen’s Handbook on Fighting a Drunk Driving Case
NHTSA Drug and Human Performance Fact Sheets
The National Highway Traffic Safety Administration offers information about the effects of impairing substances. 2004 Fact Sheet 2024 Fact Sheet
Jan Semenoff, Intoxilyzer Breath Alcohol Testing: Professional Edition
Winek’s Drug & Chemical Blood-Level Data
Reference cited by the NC State Crime Laboratory. Provides the normal, therapeutic, toxic, and lethal blood level for various drugs and their metabolites.