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1LlyfrCyhoeddwyd 1959“...National Council of Teachers of Mathematics...”
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2LlyfrCyhoeddwyd 1983“...National Council of Teachers of Mathematics...”
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3LlyfrCyhoeddwyd 1957“...National Council of Teachers of Mathematics...”
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4
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5LlyfrCyhoeddwyd 1960“...National Council of Teachers of Mathematics...”
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6LlyfrCyhoeddwyd 1977“...National Council of Teachers of Mathematics...”
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7LlyfrCyhoeddwyd 1989“...National Council of Teachers of Mathematics...”
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8LlyfrCyhoeddwyd 1978“...National Council of Teachers of Mathematics...”
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9LlyfrCyhoeddwyd 1972“...National Council of Teachers of Mathematics...”
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10LlyfrCyhoeddwyd 1961“...National Council of Teachers of Mathematics...”
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11LlyfrCyhoeddwyd 1976“...National Council of Teachers of Mathematics...”
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12LlyfrCyhoeddwyd 1963“...National Council of Teachers of Mathematics...”
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13LlyfrCyhoeddwyd 1970“...National Council of Teachers of Mathematics...”
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14Llyfrgan Kiely, Edmond R. (Edmond Richard), 1899-“...National Council of Teachers of Mathematics...”
Cyhoeddwyd 1947
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15
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16LlyfrCyhoeddwyd 1973“...National Council of Teachers of Mathematics...”
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17LlyfrCyhoeddwyd 1973“...National Council of Teachers of Mathematics...”
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18
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19Llyfrgan Heck, William P.“...National Council of Teachers of Mathematics. Instructional Affairs Committee...”
Cyhoeddwyd 1981
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20CylchgrawnCyhoeddwyd 1926“...National Council of Teachers of Mathematics. Louisiana-Mississippi Chapter...”
Cael y testun llawn