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![Gold and Silver Ores, What is Their Value? [microform]: Simple Field Tests for Prospectors With an Inexpensive Outfit](https://images.cdn1.buscalibre.com/fit-in/180x180/10/ac/10ac463fc236273a34723d34ec4b23c8.jpg)










![Lamb's Textile Industry of the United States [microform], Embracing Biographical Sketches of Prominent Men and a Historical Résumé of the Progress of](https://images.cdn2.buscalibre.com/fit-in/180x180/e7/78/e778554a34e28649edcff155bf9e644d.jpg)






![Minerals and Mining, Nova Scotia [microform]](https://images.cdn1.buscalibre.com/fit-in/180x180/cf/17/cf175fbf9d24fcba24f2a274d28d2365.jpg)







