@inbook{40f94c8cf0a14f908f582b175a61ea60,
title = "Introduction",
keywords = "Wiskunde en Informatica (WIIN), Mathematics, Pedagogie en Andragogie/Onderwijskunde (PEAN), Landbouwwetenschappen, Natuurwetenschappen, Wiskunde: algemeen",
author = "K.P.E. Gravemeijer",
year = "2004",
language = "Undefined/Unknown",
isbn = "90-74684-22-X",
publisher = "Freudenthal Institute",
pages = "5--7",
editor = "P.H.M. Drijvers",
booktitle = "Classroom-based Research in Mathematics Education,. Overview of doctoral research published by the Freudenthal Institute, 2001-2004",
}