Runner, J. J., & Hartmann, M. L. (1918). The occurrence, chemistry, metallurgy and uses of tungsten: With special reference to the Black Hills of South Dakota.
Lua i Stíl Chicago (17ú heag.)Runner, Joseph James, agus Miner Louis Hartmann. The Occurrence, Chemistry, Metallurgy and Uses of Tungsten: With Special Reference to the Black Hills of South Dakota. Rapid City, So. Dak, 1918.
Lua MLA (8ú heag.)Runner, Joseph James, agus Miner Louis Hartmann. The Occurrence, Chemistry, Metallurgy and Uses of Tungsten: With Special Reference to the Black Hills of South Dakota. 1918.
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