A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The Calumet and Hecla Company's properties
The first of a series of illustrated articles on this prominent copper district, reviewing the past, discussing the present and the future outlook. (Serial. 1st part) (1600 w.) (No. 79764)
The Calumet and Hecla Company's properties
The first of a series of illustrated articles on this prominent copper district, reviewing the past, discussing the present and the future outlook. (Serial. 1st part) (1600 w.) (No. 79764)
The Calumet and Hecla Company's properties
Min Wld
1906
Article (Journal)
English
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Safety posters at calumet and hecla mines
| Engineering Index Backfile | 1935
Welfare work of the calumet and hecla
Engineering Index Backfile | 1914
Reclaiming calumet and Hecla tailings with a hydraulic dredge
| Engineering Index Backfile | 1915
Human engineering at the Calumet and Hecla
| Engineering Index Backfile | 1929
The Coal Hoists of the Calumet and Hecla Mining Company
| ASCE | 2021