http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Washing and coking tests of coal and cupola tests of coke. Conducted by the United States fuel-testing plant at St. Louis, Mo
Geological Survey bulletin 336; Washing and coking tests of coal and cupola tests of coke
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ProQuest U.S. Serial Set Digital Collection