曙暮光 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "曙暮光" in Chinese language version.

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harvard.edu

Van Flandern, T.; K. Pulkkinen. Low precision formulae for planetary positions (PDF). Astrophysical Journal, Supplement Series. 1980, 31 (3) [2010-01-01]. （原始内容存档 (PDF)于2021-08-12）.

Van Flandern, T.; K. Pulkkinen. Low precision formulae for planetary positions (PDF). Astrophysical Journal, Supplement Series. 1980, 31 (3) [2010-01-01]. （原始内容存档 (PDF)于2021-08-12）.
NASA-Jet Propulsion Laboratory: Winter Solstice on Mars: Rovers Look Forward to A Second Martian Spring （页面存档备份，存于互联网档案馆）, August 7, 2006