[Detection and comparison of fiber count concentration in processing environment of asbestos and man-made mineral fiber]. - Jiang ZQ; Shao DC; Cheng YR; Miao C; Chai JR; Xu CM; Yu M; Wang J; Li T; Chen JQ (Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases, 2020)