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Investigations of Permissible Electric Mine Lamps, 1930-40
L. C. Ilsley
, A. B. Hooker
, Etats-Unis. Mines (Bureau)
, W. H. Roadstrum
· 1942
No image available
Being, successful as an engineer
W. H. Roadstrum
· 1978
No image available
Excellence in engineering
W.H. Roadstrum
· 1967
