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APA-referensUnited Nations. Economic Commission for Europe. (1972). The use of timber underground in mines. United Nations Economic Commission for Europe : Food and Agriculture Organization of the United Nations.
Chicago-stil citatUnited Nations. Economic Commission for Europe. The Use of Timber Underground in Mines. Geneva: United Nations Economic Commission for Europe : Food and Agriculture Organization of the United Nations, 1972.
MLA-referensUnited Nations. Economic Commission for Europe. The Use of Timber Underground in Mines. United Nations Economic Commission for Europe : Food and Agriculture Organization of the United Nations, 1972.
Harvard-stil citatUnited Nations. Economic Commission for Europe. 1972. The use of timber underground in mines. Geneva: United Nations Economic Commission for Europe : Food and Agriculture Organization of the United Nations.