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800211s1979 dcua b f000 0 eng d |
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|a ocm05970995
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|a (GPO)80008517
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|b Publications Distribution Branch, 4800 Forbes Ave., Pittsburgh, Pa. 15213
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|c GPO
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|a COD9
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|a 637-A
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|a I 28.23:8395
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|a I 28.23:8395
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|a Hanson, Bruce D.
|0 http://id.loc.gov/authorities/names/n80017270
|1 http://isni.org/isni/0000000020358537.
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|a Effect of symmetric bit wear and attack angle on airborne respirable dust and energy consumption /
|c by Bruce D. Hanson and Wallace W. Roepke.
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|a [Washington] :
|b Dept. of the Interior, Bureau of Mines,
|c 1979.
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300 |
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|a 24 pages :
|b illustrations ;
|c 27 cm.
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|a text
|b txt
|2 rdacontent.
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|a unmediated
|b n
|2 rdamedia.
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|a volume
|b nc
|2 rdacarrier.
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|a Report of investigations - Bureau of Mines ; 8395.
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|a Bibligraphy: page 12.
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|a Bits (Drilling and boring)
|0 http://id.loc.gov/authorities/subjects/sh85014471.
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|a Coal-mining machinery.
|0 http://id.loc.gov/authorities/subjects/sh85027388.
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|a Coal mines and mining
|x Dust control.
|0 http://id.loc.gov/authorities/subjects/sh85027366.
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|a Roepke, Wallace W.
|0 http://id.loc.gov/authorities/names/n80017265
|1 http://isni.org/isni/0000000024294091.
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|a United States.
|b Bureau of Mines.
|0 http://id.loc.gov/authorities/names/n79063444
|1 http://isni.org/isni/0000000122941336.
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|a Report of investigations (United States. Bureau of Mines) ;
|v 8395.
|0 http://id.loc.gov/authorities/names/n42021077.
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|b 03-18-20
|c 10-01-95
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|a MARS - RDA ENRICHED
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