Political and commercial geology and the world's mineral resources

Note 78 — Chapter VII · TUNGSTEN By Frank L. Hess

Reading edition

Figures unaccompanied by footnote references are taken from official sources or other authentic publications. In all cases the original quantities have been reduced to their equivalent in concentrates containing 60 per cent. WO3.

[79] Figures partly official and partly estimated by the United States Geological Survey.

[80] Exports.

[81] Figures estimated by the Allies when it was proposed to allocate the tungsten ores of the world among themselves.

[82] Figures estimated by the United States Geological Survey.

[83] Less than half a ton.

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