2009-06-032009-06-0319920044-4103urn:nbn:de:hebis:34-2009060327998http://hdl.handle.net/123456789/20090603279981200456 bytesapplication/pdfengUrheberrechtlich geschützthttps://rightsstatements.org/page/InC/1.0/510Mathematics teaching in technical and vocational collegesAufsatz