http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
1 online resource (166 pages), digital, PDF file
Third in a series of reports published in 1938 contining the results of investigations conducted by the Metallurgical Division of the Bureau of Mines. Includes illustrations and tables.
Electronic reproduction. [Bethesda, Md.] : ProQuest, 2017 digital, PDF file. ProQuest U.S. Executive Branch Documents Mode of access: World Wide Web via ProQuest website.