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Noffke, Nora; Christian, Daniel; Wacey, David; Hazen, Robert M. (8 November 2013). "Microbially Induced Sedimentary Structures Recording an Ancient Ecosystem in the ca. 3.48 Billion-Year-Old Dresser Formation, Pilbara, Western Australia". Astrobiology13 (12): 1103–24. Bibcode2013AsBio..13.1103N. doi:10.1089/ast.2013.1030. PMC3870916. PMID24205812.
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Noffke, Nora; Christian, Daniel; Wacey, David; Hazen, Robert M. (8 November 2013). "Microbially Induced Sedimentary Structures Recording an Ancient Ecosystem in the ca. 3.48 Billion-Year-Old Dresser Formation, Pilbara, Western Australia". Astrobiology13 (12): 1103–24. Bibcode2013AsBio..13.1103N. doi:10.1089/ast.2013.1030. PMC3870916. PMID24205812.
Weather. World Book Online Reference Center. NASA/World Book, Inc (2005). Басты дереккөзінен мұрағатталған 13 желтоқсан 2010. Тексерілді, 17 наурыз 2007.
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Orbital Ephemerides of the Sun, Moon, and Planets (PDF). International Astronomical Union Commission 4: (Ephemerides). Басты дереккөзінен мұрағатталған 14 қазан 2012. Тексерілді, 3 сәуір 2010. See table 8.10.2. Calculation based upon 1 AU = 149,597,870,700(3) m.