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Minural Resources of the United States, 1887, by David T. Day. 18H8. 8^ vii,832iip. Price50 cents. 

 Mineral Resources of the United State.s, 1888, by David T. Day. 1800. 8^. vii, 652 pp. Price 50 cents. 

 Mineral Resources of the United States, 1889 and 1890, by David T. Day. 1892. 8°. viii, 671 pp. 

 Price 50 cents. 

 MiueralResourcesof the UnitedStates, 1891, by David T.Day. 1893. 8°. vii,630pp." PricoDOcents. 



In preparation : 



Mineral Resources of the United States, 1892. 



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