RT Journal Article SR Electronic T1 Smoking in China: "the limits of space". JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP 77 OP 79 DO 10.1136/tc.6.2.77 VO 6 IS 2 A1 J Mackay YR 1997 UL http://tobaccocontrol.bmj.com/content/6/2/77.abstract AB