Open access

Report

Aguilera, Roberto F. 2009. United Nations framework classification for fossil energy and mineral reserves and resources, UN Expert Group on Resource Classification (ERGC), ECE Energy Series No. 39, New York, USA and Geneva, Switzerland: United Nations Economic Commission for Europe (UNECE).

http://www.unece.org/fileadmin/DAM/energy/se/pdfs/UNFC/unfc2009/UNFC2009_ES39_e.pdf

United Nations Publication

http://hdl.handle.net/20.500.11937/12313