RT Journal Article SR Electronic T1 Study of occupational lung cancer in asbestos factories in China. JF Occupational and Environmental Medicine JO Occup Environ Med FD BMJ Publishing Group Ltd SP 719 OP 719 DO 10.1136/oem.51.10.719 VO 51 IS 10 A1 R W Morgan A1 K E Zhao YR 1994 UL http://oem.bmj.com/content/51/10/719.1.abstract AB