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© May 2005 Lorentz JÄNTSCHI && Sorana Daniela BOLBOACĂ

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 G03 Environment and Public Health D004778 +
  G03.850 Public Health D011634 +
   G03.850.860 Sanitation D012499 +
    G03.850.860.510 Sanitary Engineering D012498 +
     G03.850.860.510.900 Waste Management D018505 +
      G03.850.860.510.900.600 Refuse Disposal D012037 +
       G03.850.860.510.900.600.500 Incineration D017745