America's Industrial Heritage Project : seldom seen mine. - United States. Dept. of the Interior. Southwestern Pennsylvania Heritage Preservation Commission ([Washington, D.C.?] : U.S. Dept. of the Interior, Southwestern Pennsylvania Heritage Commission, National Park Service, 1993)
"NPS D-68"--P. [3] of cover.
"April 1993."
Shipping list no.: 93-0409-P.
Mode of access: Internet.
Keywords: America's Industrial Heritage Project; Historic sites -- Pennsylvania