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	1.	Silica in Canada; its occurrence, exploitation and uses, by L. Heber Cole. by Canada. Mines Branch (1901-1936) Cole, Lionel Heber, 1883- Material type: Text; Format: print ; Literary form: Not fiction Publication details: Ottawa, Government Printing Bureau, 1923-28 Availability: No items available. Add to cart (remove)
	2.	Das Kali, die Gewinnung, Verarbeitung und Verwertung der Kalisalze, ihre Geschichte und wirtschaftliche Bedeutung, von Dr. Paul Krische. by Krische, Paul, 1878- Fulda, Ernst, 1885- Gropp, Willy Krull, Otto Material type: Text; Format: print ; Literary form: Not fiction Publication details: Stuttgart, F. Enke, 1923-28 Availability: No items available. Add to cart (remove)

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