51st Annual meeting of the Minnesota Section, AIME and 39th annual Mining Symposium
Subtitle: January 11,12,13, 1978, Duluth, Minnesota
By: compiled by Loretta Klatt Graven.
Contributors: Graven, Loretta Klatt.; American Institute of Mining, Metallurgical and Petroleum Engineers. Minnesota Section
Publisher: s.n.]
Published: 1978
Place of publication: [s.l
Language: eng
Subjects: Mineral industries -- Congresses.; Mineral industries -- United States -- Congresses.
Other titles: Productivity in Lake Superior district mining.; Fifty-first annual meeting of the Minnesota Section, AIME and thirty-ninth annual Mining Symposium.
Notes: On cover: Productivity in Lake Superior district mining.

"Sponsored by Minnesota Section, AIME ... [et al.]."

11