Brief account of the methods that have been used here by small advance pilot and later by Greathead shield.
Hudson River tunnel
RR Gaz
Railroad Gazette ; XXII
1890
Illustrations
Aufsatz (Zeitschrift)
Englisch
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Engineering Index Backfile | 1889
Engineering Index Backfile | 1904
Hudson River tunnel railroad terminal
Engineering Index Backfile | 1892
|Fire in the Hudson river tunnel
Engineering Index Backfile | 1890
Engineering Index Backfile | 1904