International Review of EducationJune 1967, Volume 13, Issue 2, pp 175–179 | Cite asLa recherche pedagogique en SuisseAuthorsAuthors and affiliationsSamuel RollerCommunicationsThis 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 1967Authors and AffiliationsSamuel Roller11.Genéve