The price of precious.

Manylion Llyfryddiaeth
Cyhoeddwyd yn:	National geographic. 224, 4 (Oct. 2013).
Prif Awdur:	Gettleman, Jeffrey
Fformat:	Erthygl
Iaith:	English
Pynciau:	Congo (Democratic Republic > Economic conditions. Mines & mineral resources > Congo (Democratic Republic) Mineral mining.