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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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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731-1 Methodology
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731-2 Energy policy
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731-3 Economic data on energy
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731-10 Methodology.
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731-20 Energy policy.
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731-21 Legislation, regulations for energy use.
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731-21 Legislation, regulations for energy use.
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731-30 Economic data on energy.
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731-41 Coal
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731-42 Electricity
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731-43 Nuclear
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731-44 Gas
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731-45 Oil
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731-46 New energies
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731-1 Methodology
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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