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4
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United Nations framework classification for resources : update 2019 / UNECE.
- 333.79 U58135
- United Nations,
- Geneva :
-
Survey on Incorporating the Environmental Dimension into Development Plans.
- 338.956 S9631
- United Nations,
- 1998.
- New York :
-
United Nations framework classification for fossil energy and mineral reserves and resources 2009 : incorporating specifications for its application.
- 333.82012 U5813i
- United Nations,
- 2013.
- New York ; Geneva :
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United Nations framework classification for fossil energy and mineral reserves and resources 2009.
- 333.82012 U5813
- United Nations,
- 2010
- New York ; Geneva :