RT Journal Article SR Electronic T1 European smoke-free class competition JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 326 OP 326 DO 10.1136/tc.7.3.326 VO 7 IS 3 A1 REINER HANEWINKEL A1 GUDRUN WIBORG A1 MERI PAAVOLA A1 ERKKI VARTIAINEN YR 1998 UL http://tobaccocontrol.bmj.com/content/7/3/326.1.abstract AB