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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522-1 General points
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522-57 Mathematical sciences and techniques
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522-75 Physical sciences and techniques
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522-171 Technology
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522-255 Earth sciences
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522-256 Geology; mineralogy
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522-259 Geophysics. Oceanography. Navigation
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522-274 Meteorology
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522-283 Geography
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522-284 General points and theories
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522-285 Physical geography
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522-286 Cartography
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522-300 Travel and exploration
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522-311 Human geography
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522-312 Social geography
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522-313 Economic geography
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522-284 General points and theories
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522-314 Human action
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522-256 Geology; mineralogy
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522-336 Life sciences
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522-1 General points
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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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760- Public health. Hygiene.
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770- Psychology. Psychoanalysis. Psychiatry.
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790- Information and communication sciences