@techreport{RN294, author = {Campbell, B. J.}, title = {The Relationship of Seat Belt Law Enforcement to Level of Belt Use}, institution = {UNC Highway Safety Research Center}, number = {HSRC-TR72}, month = {1987/06}, url = {https://trid.trb.org/view.aspx?id=285449}, year = {1987}, type = {Report} }