All

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 I02 Education D004493 +
  I02.903 Teaching D013663 +
   I02.903.847 Teaching Materials D013664 +
     I02.903.847.297 Audiovisual Aids D001296 
     I02.903.847.508 Textbooks D013782 
 L01 Information Science D007254 +
  L01.178 Communications Media D003146 +
   L01.178.820 Teaching Materials D013664 +
     L01.178.820.900 Textbooks D013782