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Zippo Zippo, mù tạt và em Zipoetes I của Bithynia Zipoites II của Bithynia ZipTorrent Zipoetopsis unicolor Zipoetes grisescens Zipoetes rufescens Zoppola Zipoetopsis dissimilisTài liệu tham khảo
WikiPedia: Zippo http://www.americanheritage.com/articles/magazine/... http://www.google.com/patents?vid=2032695 http://www.zippo.com http://www.zippo.com/75years/auction/anniversaryAu... http://www.zippo.com/Media/PDF/ZippoBLU_pressRelea... http://www.zippo.com/NewsAndEvents/Zippo_Announces... http://www.zippo.com/NewsAndEvents/Zippo_Announces... http://www.zippo.com/corporateInfo/Zippo_Manufactu... http://www.zippocanada.com http://www.zippoclick.com/media/pdf/collectorsGuid...