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![](./img/clear.gif) 1.- A field method for the determination of tungsten and molybdenum in rocks, soils and plant ash
Jeffery, P.G.
1955
Revistas
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![](./img/clear.gif) 2.- Chemical methods of rock analysis
Hutchison, D.; Jeffery, P.G.
Oxford: Pergamon, 1981
Pergamon series in Analytical Chemistry
Recursos Minerales
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