Westmeyer, P. (1969). A summary of research in science education for the years 1965-67, secondary level. ERIC.
Chicago-čujuhus (17. p.)Westmeyer, Paul. A Summary of Research in Science Education for the Years 1965-67, Secondary Level. Ohio, Estados Unidos: ERIC, 1969.
MLA-čujuhus (9. p.)Westmeyer, Paul. A Summary of Research in Science Education for the Years 1965-67, Secondary Level. ERIC, 1969.
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