@inbook{ffcce2e20f6c42a3aa0de3c525bb8f09,
title = "Core Content for Packages and Polygons",
keywords = "Mathematics, Landbouwwetenschappen, Natuurwetenschappen, Wiskunde: algemeen",
author = "E.J.G. Feijs and Reeuwijk, {M. van} and M.M. Wijers",
note = "National Center for Research in Mathematical Sciences Education & Freudenthal Institute (Ed.)",
year = "2000",
language = "Undefined/Unknown",
publisher = "Encyclopedia Britannica Educational Corporation",
editor = "NCRMSE and FI",
booktitle = "Mathematics in Context, A Connected Curriculum for grades 5-8",
}