| Title |
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De negenpuntscirkel (of de cirkel van Feuerbach)
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| Author |
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| Language |
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Dutch
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| Source (journal) |
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Pythagoras : wiskundetijdschrift voor jongeren. - Groningen, 1961, currens | |
| Publication |
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Groningen : Wolters-Noordhoff, 2018
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| ISSN |
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0033-4766
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| Volume/pages |
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58:1(2018), p. 32
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| Full text (open access) |
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