Koran, J. J. (1972). A summary of research in science education for the years of 1968-69 college level science. ERIC.
Citace podle Chicago (17th ed.)Koran, John J. A Summary of Research in Science Education for the Years of 1968-69 College Level Science. Ohio, Estados Unidos: ERIC, 1972.
Citace podle MLA (9th ed.)Koran, John J. A Summary of Research in Science Education for the Years of 1968-69 College Level Science. ERIC, 1972.
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