Discussion of " The Pennsylvania Avenue Subway and Tunnel, Philadelphia, Pa. by George S. Webster and Samuel Tobias Wagner"

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by Joseph M. Wilson,
Charles G. Darrach,
William Barclay Parsons,
George A. Soper,
Richard L. Humphrey,

Serial Information: Transactions of the American Society of Civil Engineers, 1902, Vol. XLVIII, Issue 2, Pg. 548-570

Document Type: Discussion & Closure

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