CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 7, Issue 6,2004, Pages 520-520, doi:10.3969/j.issn.1007-9564.2004.06.027
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CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 7, Issue 6,2004, Pages 554-555, doi:10.3969/j.issn.1007-9564.2004.06.058
CHINESE JOURNAL OF COAL INDUSTRY MEDICINE, Volume 7, Issue 6,2004, Pages 511-511, doi:10.3969/j.issn.1007-9564.2004.06.019