Staple Bend Tunnel : Allegheny Portage Railroad National Historic Site /

Bibliographic Details
Corporate Authors:	Sellards & Grigg, Inc, United States. National Park Service
Format:	Government Document eBook
Language:	English
Published:	[Washington, D.C.?] : U.S. Dept. of the Interior, National Park Service, [1991]
Subjects:	Tunnels > Pennsylvania > Design and construction > History. Railroad tunnels > Pennsylvania > History. Allegheny Portage Railroad National Historic Site (Pa.)
Online Access:	https://purl.fdlp.gov/GPO/LPS114182

Available Online