50th Annual meeting of the Minnesota Section, AIME and 38th annual Mining Symposium
Subtitle: January 12,13,14, 1977, Duluth, Minn.
By: compiled by Loretta Klatt Graven.
Contributors: Graven, Loretta Klatt.; American Institute of Mining, Metallurgical and Petroleum Engineers. Minnesota Section
Publisher: s.n.]
Published: 1977
Place of publication: [s.l
Language: eng
Subjects: Mineral industries -- Congresses.; Iron mines and mining -- Congresses.; Iron industry and trade -- Congresses.
Other titles: Fiftieth annual meeting of the Minnesota Section, AIME and thirty-eighth annual Mining Symposium.; The World of iron ore, 50 years of progress in Minnesota.
Notes: On cover: The world of iron ore, 50 years of progress in Minnesota.

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