“A Brief History of the Oregon Iron Industry,” http://lakeoswegopreservationsociety.org/iron-industry-history/
Architectural Heritage Center/Bosco-Milligan Foundation
Beckley Furnace http://beckleyfurnace.org/
Lake Oswego Preservation Society
Lake Oswego Public Library Historic Photographs Collection
Oregon Historical Society & Research Library
Oswego Iron Heritage Trail, City of Lake Oswego
“Oswego Iron Furnace” Oregon Encyclopedia
Sharon Historical Society http://sharonhist.org/sharon-history/iron-industry/
Society for Industrial Archaeology http://www.sia-web.org/