Minimum Purchasing Age for Alcohol and Traffic Crash Injuries Among 15- to 19-Year-Olds in New Zealand. - Kypri, Kypros; Langley, John D.; Stephenson, Shaun C. R.; Begg, Dorothy J.; Davie, Gabrielle S.; Voas, Robert B.; Tippetts, A. Scott (American Journal of Public Health, 2006)