Some essential safety factors in tunneling / by D. Harrington and S.H. Ash.

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Bibliographic Details
Main Authors: Harrington, D. (Daniel), 1878-, Ash, S. H. (Simon Harry), 1889- (Author)
Corporate Author: United States. Bureau of Mines
Format: Government Document Book
Language:English
Published: Washington : U.S. Govt. Print. Off, 1941.
Series:Bulletin (United States. Bureau of Mines) ; 439.
Subjects:

MARC

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245 1 0 |a Some essential safety factors in tunneling /  |c by D. Harrington and S.H. Ash. 
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300 |a iv, 61 pages including illustrations, tables. ;  |c 23 cm. 
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490 1 |a United States. Bureau of mines. Bulletin 439. 
500 |a No.430-439 issued bound together. 
500 |a At head of title: United States Dept. of the interior, Harold L. Ickes, secretary. Bureau of mines, R.R. Sayers, director. 
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650 0 |a Tunneling.  |0 http://id.loc.gov/authorities/subjects/sh85138670. 
650 0 |a Accidents  |x Prevention.  |0 http://id.loc.gov/authorities/subjects/sh85000371. 
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