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How to distinguish the strata in which it may be found. (1900 w.)
How to distinguish the strata in which it may be found. (1900 w.)
Prospecting for coal in Colorado
Mines Min
Lakes, Arthur (Autor:in)
1899
Ill.
Aufsatz (Zeitschrift)
Englisch
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Prospecting in San Juan Mountains, Colorado
Engineering Index Backfile | 1910
|Engineering Index Backfile | 1928
|Engineering Index Backfile | 1962
|Engineering Index Backfile | 1897
|Engineering Index Backfile | 1955
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