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I 28.27:6490
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Mining methods of Kirkland Lake Gold-Mining Co. (Ltd.), at Kirkland Lake, Ontario |
1 |
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I 28.27:6492
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Milling methods at the Midvale concentrator of the U.S. Smelting, Refining & Mining Co., Midvale, Utah |
1 |
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I 28.27:6493
|
Opals |
1 |
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I 28.27:6495
|
Underground chute gates in metal mines |
1 |
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I 28.27:6496
|
A comment upon present-day geophysics |
1 |
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I 28.27:6497
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Milling methods and costs at the Montana mine concentrator of the Eagle-Picher Lead Co., Ruby, Ariz |
1 |
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I 28.27:6499
|
Boron and its compounds |
1 |
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I 28.27:6500
|
Geophysical abstracts, no. 1-127 |
1 |
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I 28.27:6502
|
Topaz |
1 |
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I 28.27:6503
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Mining methods and costs at metal mines of the United States |
1 |
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I 28.27:6504
|
Umber, sienna, and other brown earth pigments |
1 |
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I 28.27:6508
|
Milling practice of the Kirkland Lake Gold Mines (Ltd.), Kirkland Lake, Ontario |
1 |
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I 28.27:6512
|
Mining methods and costs at the Central-Eureka Mine, Amador County, Calif |
1 |
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I 28.27:6513
|
Method and cost of quarrying limestone at the quarry of the Trinity Portland Cement Co., Fort Worth, Tex |
1 |
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I 28.27:6514
|
Mining methods of the molybdenum corporation of America at Questa, N. Mex |
1 |
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I 28.27:6515
|
Mining methods and costs at the Champion Copper Mine, Painesdale, Mich |
1 |
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I 28.27:6518
|
Garnets (gem stones) |
1 |
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I 28.27:6522
|
Method and cost of quarrying, crushing and grinding limestone at the Catskill Plant of North American Cement Corporation, Catskill, N.Y. |
1 |
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I 28.27:6523
|
Pyrites : general information |
1 |
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I 28.27:6524
|
Utilization of dolomite and high-magnesium limestone |
1 |