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Occupational exposure to xylene

National Institute for Occupational Safety and Health (U.S.).

出版	U.S. Department of Health, Education, and Welfare, Public Health Service, Center for Disease Control, National Institure for Occupational Safety and Health ; Washington, D.C., 1975
URL	http://books.google.com.hk/books?id=uzMM0_3PYcYC&hl=&source=gbs_api