Laying track on the Chicag Milwaukee & Puget Sound Railway. Tunnel near the summit of one of the mountain passes. mountains west of the St. Paul Pass tunnel. THE EXTENSION OF THE CHICAG MILWAUKEE & ST. PAUL RAILWAY TO THE PACIFIC COAST., scientific american, -1909-02-20
Laying track on the Chicag Milwaukee & Puget Sound Railway. Tunnel near the summit of one of the mountain passes. mountains west of the St. Paul Pass tunnel. THE EXTENSION OF THE CHICAG MILWAUKEE & ST. PAUL RAILWAY TO THE PACIFIC COAST., scientific american, -1909-02-20
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