Mining and upgrading of brown coal in Europe : developments and prospects
prepared by the Secretariat of the Economic Commission for Europe
Bok Engelsk 1957
Utgitt | Geneva : United Nations , 1957
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Omfang | 1 b. (flere pag.)
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Opplysninger | "United Nations publication. Sales no. : 1957.II.E/Mim.20."
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Emner |