CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 6, Issue 9,2003, Pages 860-861, doi:10.3969/j.issn.1007-9564.2003.09.066
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 6, Issue 9,2003, Pages 878-878, doi:10.3969/j.issn.1007-9564.2003.09.082
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 6, Issue 9,2003, Pages 832-832, doi:10.3969/j.issn.1007-9564.2003.09.038
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 6, Issue 9,2003, Pages 862-862, doi:10.3969/j.issn.1007-9564.2003.09.068
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 6, Issue 9,2003, Pages 866-866, doi:10.3969/j.issn.1007-9564.2003.09.073