Lowell, L. (1997). Sifting through science: Teacher's guide. Lawrence Hall of Science, University of California.
Citace podle Chicago (17th ed.)Lowell, Laura. Sifting Through Science: Teacher's Guide. Berkeley, CA: Lawrence Hall of Science, University of California, 1997.
Citace podle MLA (9th ed.)Lowell, Laura. Sifting Through Science: Teacher's Guide. Lawrence Hall of Science, University of California, 1997.
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