[Quality of chest X-ray films of dust exposed workers in Guangxi district].
Li
Xiao-ping
XP
Ge
Xian-min
XM
Wang
Li-heng
LH
D002681:China; D006801:Humans; D011009:Pneumoconiosis / Q000000981:diagnostic imaging*; D011786:Quality Control; D013902:Radiography, Thoracic; D014962:X-Ray Film