@inbook{08f78c0851204595a3cc1f14f46ee8dd,
title = "Calculator",
keywords = "Wiskunde en Informatica (WIIN), Mathematics, Landbouwwetenschappen, Natuurwetenschappen, Wiskunde: algemeen",
author = "{van den Brink}, F.J. and {de Moor}, E.W.A.",
year = "2001",
language = "Undefined/Unknown",
publisher = "Freudenthal Institute & SLO",
pages = "203--226",
editor = "{van den Heuvel}, M.H.A.M.",
booktitle = "Children Learn Mathematics. A learning-teaching trajectory with intermediate attainment targets for calculation with whole numbers in Primary School",
}