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| url = [http://www.ipni.org ipni.org]
| alexa = positive decrease 355 ♦355,329 (2013.4)<ref name="alexa">{{cite web|url= http://www.alexa.com/siteinfo/ipni.org |title= Ipni.org Site Info | publisher= [[Alexa Internet]] |accessdate= 2013-04-22 }}</ref><!--Updated monthly by OKBot.-->
| commercial = 否
| type = 資料庫