(1967). Position and motion: A science unit for the upper elementary grades ; student manual (Trial ed.). Science Curriculum Improvement Study.
Chicago-viite (17. p.)Position and Motion: A Science Unit for the Upper Elementary Grades ; Student Manual. Trial ed. Berkeley, CA: Science Curriculum Improvement Study, 1967.
MLA-viite (9. p.)Position and Motion: A Science Unit for the Upper Elementary Grades ; Student Manual. Trial ed. Science Curriculum Improvement Study, 1967.
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