@inbook{359c00ed424248a0ae5d2f9178fcffda,
title = "Instructional design for teaching concepts : do the number and dispersion of examples influence the abstraction of a cognitive model of a concept?",
keywords = "METIS-136126",
author = "Leemkuil, {Hendrik H.}",
year = "1990",
language = "Undefined",
isbn = "0-87778-221-0",
pages = "123--132",
booktitle = "Research on instruction : design and effects / eds. S. Dijkstra, B.H.A.M. van Hout Wolters, P.C. van der Sijde",
publisher = "Educational Technology Publications",
}