"Colvin Run Mill - History"(PDF). The American Society of Mechanical Engineers (ASME). 10 May 2001. Archived from the original(PDF) on 17 July 2011. Retrieved 15 May 2008.
"Colvin Run Mill - History"(PDF). The American Society of Mechanical Engineers (ASME). 10 May 2001. Archived from the original(PDF) on 17 July 2011. Retrieved 15 May 2008.