Horseshoe Curve site development plan, Altoona, Pennsylvania.
Contributors: United States. National Park Service.
Publisher: U.S. Dept. of the Interior, National Park Service
Published: 1988
Place of publication: [Washington, D.C.?]
Language: eng
Subjects: Railroads -- Pennsylvania -- Curves and turnouts.
Notes: Shipping list no.: 88-173-P.

"January 1988."