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1Published 1987“...National Council of Teachers of Mathematics,...”
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2Published 1961“...National Council of Teachers of Mathematics,...”
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3Published 1969“...National Council of Teachers of Mathematics,...”
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4Published 1990“...National Council of Teachers of Mathematics,...”
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5Published 1993“...National Council of Teachers of Mathematics,...”
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6Published 2008“...National Council of Teachers of Mathematics,...”
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7Published 1988“...Lawrence Erlbaum Associates ; National Council of Teachers of Mathematics,...”
Conference Proceeding Book -
8Published 1988“...Lawrence Erlbaum Associates ; National Council of Teachers of Mathematics,...”
Conference Proceeding Book