Leddra, M. (2010). Time matters: Geology's legacy to scientific thought. Wiley.
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Chicago-čujuhus (17. p.)
Leddra, Michael. Time Matters: Geology's Legacy to Scientific Thought. Hoboken, NJ: Wiley, 2010.
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MLA-čujuhus (9. p.)
Leddra, Michael. Time Matters: Geology's Legacy to Scientific Thought. Wiley, 2010.
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