衝 (天體位置) (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "衝 (天體位置)" in Chinese language version.

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U.S. Naval Observatory Nautical Almanac Office. P. Kenneth Seidelmann , 编. Explanatory Supplement to the Astronomical Almanac. University Science Books, Mill Valley, CA. 1992: 733. ISBN 0-935702-68-7.