Check out these references for supporting data on chiropractic treatment of whiplash injuries:
Borchgrevink G. Acute treatment of whiplash neck sprain injuries: a randomized trial of treatment during the first 14 days after a car accident. Spine 1998; vol 23, no. 1:25-31.
Squires B. Soft-tissue injuries of the cervical spine: A 15-year follow-up. Journal of Bone and Joint Surgery (British Edition) 1996; vol 70B, pp955-57.
Lord S. Chronic cervical zygapophysial joint pain after whiplash. Spine 1996; vol 21, no.15:1737- 45. Spitzer W. Redefining "whiplash" and its management. Scientific Monograph of the Quebec Task Force on Whiplash-Associated Disorders, Spine vol20, no.8S:1s-72s