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Kansas City, Mo. [u.a.]: Andrews. McMeel, 2001
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National Council of Teachers of Mathematics, 1997
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National Council of Teachers of Mathematics, 1994
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The National Council of Teachers of Mathematics, 1992
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National Council of Teachers of Mathematics, 1992
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National Council of Teachers of Mathematics, 2006
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National Council of Teachers of Mathematics, 2004
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Informa UK Limited, 2001