National Assessment of Educational Progress. (1979). Mathematical knowledge and skills: Selected results fron the second assessment of mathematics. The Assessment.
Citace podle Chicago (17th ed.)National Assessment of Educational Progress. Mathematical Knowledge and Skills: Selected Results Fron the Second Assessment of Mathematics. Denver: The Assessment, 1979.
Citace podle MLA (9th ed.)National Assessment of Educational Progress. Mathematical Knowledge and Skills: Selected Results Fron the Second Assessment of Mathematics. The Assessment, 1979.
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