America's industrial heritage
Subtitle: southwestern Pennsylvania
Contributors: United States. National Park Service
Publisher: U.S. Dept. of the Interior, National Park Service
Published: 1991
Place of publication: [Washington, D.C.?]
Language: eng
Number of pages: 24
Subjects: America's Industrial Heritage Project; Industrial sites -- Pennsylvania; Historic sites -- Conservation and restoration -- Pennsylvania.
Notes: Cover title

Shipping list no.: 91-421-P

"Feb 91"--P. 3 of cover

"D-2A"--P. 3 of cover