America's industrial heritage
Subtitle: southwestern Pennsylvania
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: Industrial sites; Historic sites; Conservation and restoration; America's Industrial Heritage Project
Notes: Cover title.

Shipping list no.: 91-421-P.

"Feb 91"--P. 3 of cover.

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