Búsqueda por clasificación
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518- Ecoinfo
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519- Philosophy
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520- Educational sciences
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521- Sociology
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522- History of science and technology
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523- History and sciences of litterature
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524- Linguistics
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525- Prehistory and protohistory
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526- Art and archaeology
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527- History and sciences of religions
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528- Administrative science
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529- Ethnology
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531- Geography
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531-1 General
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531-24 Historical section
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531-34 Physical geography
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531-97 Human geography
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531-152 World. Multiregional geography
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531-153 Europe
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531-327 Asia
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531-368 Africa
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531-369 General and multiregional studies
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531-373 Northeast Africa. The Nile
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531-377 North Africa
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531-393 West Africa. Sahel
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531-409 Equatorial Africa
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531-410 Cameroon
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531-413 Chad
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531-414 Central African Republic
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531-415 Gabon
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531-416 Congo
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531-417 Congo(former-Zaire)
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531-420 Rwanda
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531-421 Burundi
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531-410 Cameroon
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531-422 East Africa
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531-433 Southern Africa
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531-443 Madagascar and Indian Ocean Islands
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531-369 General and multiregional studies
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531-452 America
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531-524 Oceania
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531-542 Polar regions
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531-1 General
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533- Latin america
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540- Repertory of art and archaeology.
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600-
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603- Computer processing and legal sciences
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610-
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616- Company management
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617- General economics
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731- Energy economics
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760- Public health. Hygiene.
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770- Psychology. Psychoanalysis. Psychiatry.
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790- Information and communication sciences