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- 80489249 contributor B3881147.
- 80489249 created "[1958]".
- 80489249 date "1958".
- 80489249 date "[1958]".
- 80489249 dateCopyrighted "[1958]".
- 80489249 description "Bibliographical footnotes.".
- 80489249 extent "95 p.".
- 80489249 isPartOf "Cristal del tiempo".
- 80489249 issued "1958".
- 80489249 issued "[1958]".
- 80489249 language "spa".
- 80489249 publisher "Buenos Aires, Editorial Losada".
- 80489249 subject "CB478 .R39".
- 80489249 subject "Civilization, Modern 20th century.".
- 80489249 subject "Education Aims and objectives.".
- 80489249 subject "Technology and civilization.".
- 80489249 title "La era tecnológica y la educación: el hombre, la técnica, el ambiente.".
- 80489249 type "text".