CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 5, Issue 2,2002, Pages 165-166, doi:10.3969/j.issn.1007-9564.2002.02.059
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CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 5, Issue 2,2002, Pages 155-155, doi:10.3969/j.issn.1007-9564.2002.02.050
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 5, Issue 2,2002, Pages 180-180, doi:10.3969/j.issn.1007-9564.2002.02.074