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![The Copper Mines of Lake Superior [microform]](https://images.cdn3.buscalibre.com/fit-in/180x180/16/21/1621b6e40e8501ba9ee3cc6b2bbb0438.jpg)
![The Sampling and Estimation of Ore in a Mine [microform]](https://images.cdn1.buscalibre.com/fit-in/180x180/55/5d/555d35adda5a012b252a566514d7f2c1.jpg)



![Reports and Testimonials Relating to the Iron Mines of Nova Scotia [microform]: With the Charter of the Acadian Iron and Steel Company](https://images.cdn2.buscalibre.com/fit-in/180x180/bd/2d/bd2d605e530f4a74768c17fa1b529b02.jpg)





![Rossiter Worthington Raymond [microform]: a Memorial](https://images.cdn1.buscalibre.com/fit-in/180x180/5c/79/5c79356a9c9a2cb1bb6f218597411ef5.jpg)