http://pec.lib.wvu.edu/record/P170601980Introduction to carbon monoxide gas. Serial issue. Issued as: West Virginia University. Mining Extension Service. <em>Slide-tape text</em>, no.201T. "This is one of a series of printed texts which accompanies the slide tape programs on coal mining, developed by the Mining Extension Service of West Virginia University." West Virginia University. Mining Extension Service.Coal mines and mining--Safety measures.14256