外部連結
- [http://www.aerith.net/comet/catalog/0047P/index.html 47P/Ashbrook-Jackson] – Seiichi Yoshida @ aerith.net
- [http://cometography.com/pcomets/047p.html 47P at Kronk's Cometography] / [http://cometography.com/pergroup1.html Periodic comets]
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外部連結
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