Michigan College of Mining and Technology editor text xxu Houghton Michigan College of Mining and Technology 1928- 1928 1945 continuing Trimestral eng

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v. : il. ; 24 cm 1928 2(1-2); 1929 3(2); 1930 3(3); 1932 5(4) 6(1); 1933 7(1); 1935 8(2) 9(1); 1937 11(1); 1945 18(2) Baja Inundación. Explotación Minería Tecnología 251021 20251028230832.0 GMR-117 spa