Subject: Iron mines and mining / Spatial Coverage: Minnesota - Yale University Library GeoBlacklight Search Results

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1. Geological map of the iron regions of Minnesota

1890. 2002-06-01T04:00:00Z. 2011-03-08T22:41:53Z. Winchell, N. H. (Newton Horace), 1839-1914. s.n.], Northwestern Litho. & Pub. Co.). English. Public. Minnesota.

2. Geological map of the iron regions of Minnesota [cartographic material]

1890. 2018-04-20T18:35:45Z. 2018-09-05T19:35:37Z. Winchell, N. H. (Newton Horace), 1839-1914. [publisher not identified], Northwestern Litho. & Pub. Co.). English. cartographic image. Public. Minnesota and Minnesota.