Investigation on the prevalence of tobacco exposure and the relative knowledge, attitude among college students in Baoding
SONG Huijun,LIU Fengge,MI Guangming,JI Wenqi,ZHAO Yu
Medical Reserch and Education . 2013, (4): 39 -43 .  DOI: 10.3969/j.issn.1674-490X.2013.04.011