Survey of world iron ore resources; occurence appraisal and use.

Manylion Llyfryddiaeth
Awdur Corfforaethol:	United Nations. Department of Economics and Social Affairs
Fformat:	Llyfr
Iaith:	English
Cyhoeddwyd:	New York 1955.
Cyfres:	United Nations [Document] E/2655/ST/ECA/27
Pynciau:	Iron ores. Iron industry and trade.