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                                                165
SECTION 3.8                                                 Common Data Structures



  4 0 obj
     << /Limits [ ( Radium ) ( Zirconium ) ]          % Intermediate node
         /Kids [ 20 0 R
                 21 0 R
                 22 0 R
                 23 0 R
                 24 0 R
               ]
     >>
  endobj

  5 0 obj
     << /Limits [ ( Actinium ) ( Astatine ) ]         % Leaf node
         /Names [ ( Actinium ) 25 0 R
                     ( Aluminum ) 26 0 R
                     ( Americium ) 27 0 R
                     ( Antimony ) 28 0 R
                     ( Argon ) 29 0 R
                     ( Arsenic ) 30 0 R
                     ( Astatine ) 31 0 R
                 ]
     >>
  endobj

  …

  24 0 obj
     << /Limits [ ( Xenon ) ( Zirconium ) ]           % Leaf node
         /Names [ ( Xenon ) 129 0 R
                     ( Ytterbium ) 130 0 R
                     ( Yttrium ) 131 0 R
                     ( Zinc ) 132 0 R
                     ( Zirconium ) 133 0 R
                 ]
     >>
  endobj

  25 0 obj
     89                                               % Atomic number (Actinium)
  endobj

  …

  133 0 obj
     40                                               % Atomic number (Zirconium)
  endobj

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