RT Journal Article SR Electronic T1 Tobacco sales to minors in 97 US and Canadian communities JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 300 DO 10.1136/tc.2.4.300 VO 2 IS 4 A1 T. E. Radecki A1 C. D. Zdunich YR 1993 UL http://tobaccocontrol.bmj.com/content/2/4/300.abstract AB