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