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© May 2005 Lorentz JÄNTSCHI && Sorana Daniela BOLBOACĂ

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 H01 Natural Sciences D010811 +
  H01.770 Science D012586 +
   H01.770.644 Research D012106 +
    H01.770.644.241 Empirical Research D036262 +
      H01.770.644.241.800 Observation D019370 
      H01.770.644.241.850 Qualitative Research D036301