Bethlehem Mines Corporation, Heilwood, Pennsylvania, Unidentified Project, Blueprints, undated

Bethlehem Mines Corporation, Heilwood, Pennsylvania, Unidentified Project, Blueprints, undated, Box: 139, Item: 366. Institute for the History of Technology and Industrial Archaeology Records, A&M 3936. West Virginia and Regional History Center. https://archives.lib.wvu.edu/repositories/2/archival_objects/156090 Accessed January 08, 2025.