Proceedings of the Second Pan American Scientific Congress: (section VII) Mining, metallurgy, economic geology and applied chemistry. Hennen Jennings, chairman

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(section VII) Mining, metallurgy, economic geology and applied chemistry. Hennen Jennings, chairman

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Proceedings of the Second Pan American Scientific Congress

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Proceedings of the Second Pan American Scientific Congress: (section VII) Mining, metallurgy, economic geology and applied chemistry. Hennen Jennings, chairman

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(section VII) Mining, metallurgy, economic geology and applied chemistry. Hennen Jennings, chairman

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Proceedings of the Second Pan American Scientific Congress

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Proceedings of the second Pan American Scientific Congress, Washington, U.S.A., Monday, December 27, 1915 to Saturday, January 8, 1916 1915-1916 v. 12

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Proceedings of the Second Pan American Scientific Congress, Washington, U.S.A., Monday, December 27, 1915 to Saturday, January 8, 1916

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Proceedings of the second Pan American Scientific Congress, Washington, U.S.A., Monday, December 27, 1915 to Saturday, January 8, 1916 1915- 1916 v. 8

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Mining, Metallurgy, Economic Geology and Applied Chemistry

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