52nd Annual Meeting of the Minnesota Section, AIME and 40th Annual Mining Symposium, January 10, 11, 12, 1979, Duluth, Minnesota / compiled by Loretta Klatt Graven ; [jointly sponsored by The Minnesota Section of A.I.M.E. and Continuing Education and Extension, University of Minnesota]
Metallurgical American Institute of Mining
Bok Språk ikke angitt 1979