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  1. 1

    Reading and visual fatigue per Carmichael, Leonard 1898-

    Publicat 1947
    Llibre

    Reading and visual fatigue
  2. 2

    Intelligence tests : their significance for school and society per Dearborn, Walter Fenno 1878-

    Publicat 1928
    Llibre

    Intelligence tests : their significance for school and society

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