Karplus, R., & Thier, H. (1967). A new look at elementary school science: Science curriculum improvement study. Rand McNally.
Citace podle Chicago (17th ed.)Karplus, Robert, a H.D Thier. A New Look at Elementary School Science: Science Curriculum Improvement Study. Chicago: Rand McNally, 1967.
Citace podle MLA (9th ed.)Karplus, Robert, a H.D Thier. A New Look at Elementary School Science: Science Curriculum Improvement Study. Rand McNally, 1967.
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