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Illustrates and describes methods used in the deepest mine in California. (900 w.)
Illustrates and describes methods used in the deepest mine in California. (900 w.)
Shaft timbering at the Kennedy mine
Min Sci Pr
Girard, F.J. (Autor:in)
1905
Aufsatz (Zeitschrift)
Englisch
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Engineering Index Backfile | 1925
Engineering Index Backfile | 1901
|Engineering Index Backfile | 1925
Engineering Index Backfile | 1900
|Safe and efficient mine timbering
Engineering Index Backfile | 1919
|