

Paul BaltesMax Planck Institute for Human Development (Berlin) |
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Michel HuteauInstitut National d'Etude du Travail et de l'Orientation Professionnelle (INETOP) (PsychTree) |  |

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Steven PulosUniversity of Northern Colorado (Philosophy Tree) |
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Emilia FerreiroCenter of Research and Advanced Studies of the National Polytechnic Institute In Mexico (LinguisTree)
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