TY - JOUR T1 - Respiratory health effects of opencast coalmining: a cross sectional study of current workers JF - Occupational and Environmental Medicine JO - Occup Environ Med SP - 696 LP - 696 DO - 10.1136/oem.54.9.696-a VL - 54 IS - 9 A2 - , Y1 - 1997/09/01 UR - http://oem.bmj.com/content/54/9/696.2.abstract N2 - 300 Multiple ChoicesThis is a pdf-only article and there is no markup to show you.full-text.pdf ER -