National Association of State Directors of Teacher Education and Certification. (1963). Secondary school science and mathematics teachers. National Science Foundation.
Citace podle Chicago (17th ed.)National Association of State Directors of Teacher Education and Certification. Secondary School Science and Mathematics Teachers. Wash.: National Science Foundation, 1963.
Citace podle MLA (8th ed.)National Association of State Directors of Teacher Education and Certification. Secondary School Science and Mathematics Teachers. National Science Foundation, 1963.
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