RT Journal Article SR Electronic T1 Tobacco use among US racial/ethnic minority groups JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 198 OP 209 DO 10.1136/tc.7.2.198 VO 7 IS 2 YR 1998 UL http://tobaccocontrol.bmj.com/content/7/2/198.abstract AB