A Brief History Of The Pittsburgh And Lake Superior Iron Company...Sep 29, 2011by Pittsburgh and Lake Superior Iron Compan
Exhibit of the condition and prospects of the Lake Superior Iron Company, June, 1853Jan 1, 1853by Lake Superior Iron Company., .
The Duluth, South Shore & Atlantic Railway: A History of the Lake Superior District's Pioneer Iron Ore Hauler...Nov 19, 2008by John Gaertner
A Brief History Of The Pittsburgh And Lake Superior Iron Company... - Scholar's Choice EditionFeb 15, 2015by Pittsburgh and Lake Superior Iron Compan
The Geology and Metallurgy of the Iron Ores of Lake Superior; Being a Report Addresses to the Board of Directors...Feb 3, 2010by John Watson Foster