CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 12, Issue 6,2009, Pages 914-915,
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 12, Issue 6,2009, Pages 888,
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 12, Issue 6,2009, Pages 972,
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 12, Issue 6,2009, Pages 900,
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 12, Issue 6,2009, Pages 905-906,