Site concept plan :
America's Industrial Heritage Project, Pennsylvania.
[Hollidaysburg, PA] : U.S. Dept. of the Interior, National Park Service, 
America's Industrial Heritage Project.
Canals > Canals / Pennsylvania > Canals / Pennsylvania / Saltsburg.
Historic sites > Historic sites / Pennsylvania > Historic sites / Pennsylvania / Saltsburg.
"NPS D-25"--P.  of cover.
Shipping list no.: 89-483-P.
Cover title: Saltsburg, Pennsylvania, site concept plan.
v, 12 p. :
ill. (some col.) ;
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