萨尔瓦托雷·"公牛萨米"·格拉瓦诺（，）是美国前黑帮老大，后成为甘比诺犯罪家族的二当家。作为副老大，格拉瓦诺在起诉犯罪家族老大約翰·高蒂的过程中发挥了重要作用，他同意作为政府证人指证约翰·高蒂和其他黑帮成员，并在交易中承认参与了19起谋杀案。
參考資料
外部連結
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- [http://www.trutv.com/library/crime/gangsters_outlaws/mob_bosses/gravano/index_1.html Sammy "The Bull" Gravano Biography] at Crimelibrary.com
- [https://web.archive.org/web/20110718102717/http://www.azcorrections.gov/inmate_datasearch/results_Minh.aspx?InmateNumber=171342&LastName=GRAVANO&FNMI=S&SearchType=SearchInet Salvatore Gravano Arizona Inmate Information]
- Maas, Peter. Underboss. 1997.
- Documentary series from Court TV (now TruTV) [http://filmrise.com/mugshots-sammy-gravano/ "MUGSHOTS: Sammy "The Bull" Gravano"] episode (2003) at FilmRise
- [https://www.c-span.org/video/?87686-1/underboss Booknotes interview with Maas] about Underboss: Sammy The Bull Gravano's Story of Life in the Mafia, August 24, 1997
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