@inbook{b223b9b33f9c4eabaa4b67a133c63f1a,
title = "Information modelling for courseware use : the cases of tutorial products and electronic study books",
keywords = "METIS-139935",
author = "{de Vries}, {Sjoerd A.} and {van Schaik}, P.",
year = "1992",
month = sep,
day = "1",
language = "Undefined",
pages = "--",
editor = "{De Diana}, I. and {van Schaik}, P.",
booktitle = "Aspects of courseware engineering : educational instrumentation perspectives",
publisher = "University of Twente",
address = "Netherlands",
}