• 2 Videos, Slides, Films

• 1 Duquesne University. Center for Legal Information
• 1 Duquesne University. School of Law
• 1 Dust control
• 1 Laboratories
• 1 Law librarians
• 1 Law teachers
• 1 Library directors
• 1 Liu, Frank Y. (Frank Yining), 1943-
• 1 Longwall Dust Gallery
• 1 Longwall mining
• 1 Research
• 1 Research, Industrial

• 1 Duquesne University. Center for Legal Information
• 1 Duquesne University. School of Law
• 1 Kehoe, Patrick E.
• 1 Liu, Frank Y. (Frank Yining), 1943-
• 1 National Institute for Occupational Safety and Health
• 1 National Institute for Occupational Safety and Health. Office for Mine Safety and Health Research

• 2 English

• 2 Pennsylvania

• 1 Biographies
• 1 Biography
• 1 Documentary films
• 1 Interviews
• 1 Oral histories
• 1 Streaming video
• 1 Video recordings

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