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  1. 68821
  2. 68822
  3. 68823
  4. 68824
    Article of journal
    Published in 2010
    Repositorio Universidad Nacional de Colombia

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  5. 68825
  6. 68826
  7. 68827
  8. 68828
    Article of journal
    Repositorio Universidad Nacional de Colombia

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  9. 68829
  10. 68830
  11. 68831
  12. 68832
    Article of journal
    Published in 1973
    Repositorio Universidad Nacional de Colombia

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  13. 68833
  14. 68834
  15. 68835
  16. 68836
  17. 68837
    http://purl.org/coar/resource_type/c_18cc
    Repositorio Universidad Nacional de Colombia

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  18. 68838
  19. 68839
    Article of journal
    Published in 2013
    Repositorio Universidad Nacional de Colombia

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  20. 68840