International Review of EducationSeptember 1959, Volume 5, Issue 3, pp 257–264 | Cite asEditorialAuthorsAuthors and affiliationsLes EditeursArticle 11 Downloads This is a preview of subscription content, log in to check access.PreviewUnable to display preview. Download preview PDF.Unable to display preview. Download preview PDF.Copyright information© Martinus Nijhoff 1959Authors and AffiliationsLes EditeursThere are no affiliations available