A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
United States assay office at Helena, Montana
Illustrated description of the building, equipment, and methods. (1200 w.) (No. 92335)
United States assay office at Helena, Montana
Illustrated description of the building, equipment, and methods. (1200 w.) (No. 92335)
United States assay office at Helena, Montana
Min Wld
Buskett, Evans W. (author)
1908
Article (Journal)
English
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Gold dredging operations near Helena, Montana
| Engineering Index Backfile | 1936
Running 6-cu ft dredge at Helena, Montana
| Engineering Index Backfile | 1940
Earthquakes of 1935 and Helena, Montana, water system
| Engineering Index Backfile | 1936