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Bulgaria Bulgaria Air Bulgarian Air Charter Bulgaria tại Thế vận hội Mùa hè 1896 Bulgarialeurodes cotesii Bulgaria (tàu) Bulgarian Football Union Bulgari (nhãn hiệu)Tài liệu tham khảo
WikiPedia: Bulgaria Air http://www.air.bg/ http://www.air.bg/en/about http://www.air.bg/en/schedule http://www.ch-aviation.ch/airlinepage.php?code1=FB http://www.sofiaecho.com/article/bulgaria-air-deal... http://www.sofiaecho.com/article/candidate-for-bul... https://web.archive.org/web/20070811235151/http://... https://web.archive.org/web/20070930200125/http://... https://web.archive.org/web/20080622124325/http://... https://commons.wikimedia.org/wiki/Category:Bulgar...