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Laboratory Evaluation of the Leitz Tyndallometer TM-Digital

Thomas F. TombHarry N. TreaftisEileen M. Thompson

出版	U.S. Department of the Interior, Mining Enforcement and Safety Administration, 1977
URL	http://books.google.com.hk/books?id=M0XBoAEACAAJ&hl=&source=gbs_api