Matheson Library
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21.
True uniaxial compressive strengths of rock or coal specimens are independent of diameter-to-length ratios / by C.O. Babcock. by Series: Report of Investigations (United States. Bureau of Mines) ; 9316.
Publication details: Pgh. [i.e. Pittsburgh] PA : United States Dept. of the Interior, Bureau of Mines, 1990
Availability: Items available for loan: Matheson Library (1)Call number: 622.2 B112t.

22.
Multislice mining for thick western coal seams / by T.D. Hackett, D.L. Boreck, and D.R. Clarke. by Series: Information circular (United States. Bureau of Mines)
Publication details: PGH [i.e. Pittsburgh] Pa. : U.S. Dept. of the Interior, Bureau of Mines, 1989
Availability: Items available for loan: Matheson Library (1)Call number: 622.3340978 H121m.

23.
Recovery of sulfur from phosphogypsum : conversion of calcium sulfate to calcium sulfide / by Margaret M. Ragin and Donald R. Brooks. by Series: Report of investigations (United States. Bureau of Mines) ; 9323.
Publication details: Pgh. [i.e. Pittsburgh] PA : United States Dept. of the Interior, Bureau of Mines, 1990
Availability: Items available for loan: Matheson Library (2)Call number: 661.0723 R142r, ...

24.
Mitigating destructive longwall bumps through conventional gate entry design / by Alan A. Campoli ... [et al.]. by Series: Report of investigations (United States. Bureau of Mines) ; 9325.
Publication details: Pgh. [i.e. Pittsburgh] PA : United States Dept. of the Interior, Bureau of Mines, 1990
Availability: Items available for loan: Matheson Library (1)Call number: 622.334 M684.

25.
Transfer mechanics of full-column resin-grouted roof bolts / by Stephen C. Tadolini and Robert C. Dyni. by Series: Report of investigations (United States. Bureau of Mines) ; 9336.
Publication details: Pgh. [i.e. Pittsburgh] Pa. : United States Dept. of the Interior, Bureau of Mines, 1990
Availability: Items available for loan: Matheson Library (1)Call number: 622.28 T122t.

26.
Alternative methods for copper recovery from dump leach liquors / by B. W. Madsen and R. D. Groves. by Series: Report of investigations (United States. Bureau of Mines) ; 8520.
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Pgh. [i.e. Pittsburgh], Pa. : U.S. Dept. of the Interior, Bureau of Mines, 1981
Availability: Items available for loan: Matheson Library (1)Call number: 622 M183a.

27.
Accessory metals content of commerical titanium mineral concentrates / by Jack C. White and John B. Wright. by Series: United States ; 9387. | Report of investigations (United States. Bureau of Mines) ; 9387.
Material type: Text Text; Format: print ; Literary form: Not fiction
Publication details: Pgh. [i.e. Pittsburgh] Pa. : United States Dept. of the Interior, Bureau of Mines, 1991
Availability: Items available for loan: Matheson Library (1)Call number: 669.7322 W585a.

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