XII + VI + VII | 2 | Proceedings of The Second Pan American Scientific Congress, Dec. 1915 - Jan. 1916, Washington, U. S. A. [Текст]. Section 7 : Mining, metallurgy, economic geology and applied chemistry. — Washington, 1917. — XIV, 1045 p. : ill. + [27] l. ill. + [6] m. |
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