Books about Railroad tunnels -- Design and construction

Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910

Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910

Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910

Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910

Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910

Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910

Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910

Transactions of the American Society of Civil Engineers, vol. LXVIII, Sept. 1910, Start/End Papers