RT Journal Article SR Electronic T1 Tobacco control in the United States: the next generation of demonstration and research projects. JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 342 OP 344 DO 10.1136/tc.6.4.342b VO 6 IS 4 A1 R C Brownson A1 R Schwartz YR 1997 UL http://tobaccocontrol.bmj.com/content/6/4/342.2.abstract AB