Magnesium, magnesite and dolomite, by J. Lumsden ... with the assistance of the Statistical and Indexing sections, and approved by the Consultative committee on base metals. (Great Britain. Imperial institute, London. Mineral resources department. Reports on the mineral industry of the British empire and foreign countries)
Magnesium, magnesite and dolomite, by J. Lumsden ... with the assistance of the Statistical and Indexing sections, and approved by the Consultative committee on base metals.
(Great Britain. Imperial institute, London. Mineral resources department. Reports on the mineral industry of the British empire and foreign countries)