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Period 1946-1993
Correspondence, notes, circulars, resolutions, reports 1959-1993; files relating to congresses on various mines 1951-1988 and other congresses 1957-1962, 1984-1986; documents on relations with other organizations, including the Universidad Nacional Siglo XX, ConfederaciĆ³n Universitaria Boliviana, As...
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