The iron ores of Lake Superior
Subtitle: containing facts of interest relating to mining, beneficiation and shipping of the ore and location of principal mines.
Edition: 7th ed.., with original maps of the ranges, by Crowell & Murray,inc.
Publisher: The Penton press co.
Published: 1930
Place of publication: Cleveland
Language: eng
Number of pages: 332
Subjects: Iron ores -- Superior, Lake.; Iron mines and mining -- Superior, Lake.