%0 Generic %T Coal mine dust sampling and mitigation technology oversight hearing before the Subcommittee on Mining and Natural Resources of the Committee on Interior and Insular Affairs, House of Representatives, One Hundred Second Congress, first session ... hearing held in Washington, DC, June 27, 1991. %U https://ezaccess.libraries.psu.edu/login?url=http://congressional.proquest.com/congcomp/getdoc?HEARING-ID=HRG-1991-IIA-0020