Rekenen tot twintig (1)

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Keywords

@article{e31df344bf4b4033aa2fe63e8fd064bb,

title = "Rekenen tot twintig (1)",

keywords = "Wiskunde en Informatica (WIIN), Mathematics, Landbouwwetenschappen, Natuurwetenschappen, Wiskunde: algemeen",

author = "A. Treffers",

year = "1999",

language = "Undefined/Unknown",

volume = "18",

pages = "4--10",

journal = "Willem Bartjens",

issn = "0922-1794",

number = "4",

}