Glaser, Leah S.2008-04-012008-04-012005-08http://www.cr.nps.gov/history/online_books/hofu/adhi.pdfhttps://hdl.handle.net/2450/670en-USIron-foundries -- Pennsylvania -- Berks County -- HistoryIron industry and trade -- Pennsylvania -- Berks County -- HistoryHopewell Furnace National Historic Site (Pa.) -- HistoryBerks County (Pa.) -- History, LocalReport