Graphic Method for Deflection of Roof Truss, Drawings, No Locale (Possible: Swecker Engineering, WV), undated

Graphic Method for Deflection of Roof Truss, Drawings, No Locale (Possible: Swecker Engineering, WV), undated, Box: 96, Item: 202. 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/155926 Accessed November 22, 2024.