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File:All-time-world-HW-title-table.png - Wikimedia Commons
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Lineal Heavyweight Championship infographic - this took me 2 days to make. Enjoy! : r/Boxing
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/origin-imgresizer.eurosport.com/2014/04/13/1217139-25399913-2560-1440.jpg "World boxing champions - Eurosport")
World boxing champions - Eurosport
The 10 Longest-Reigning Welterweight Boxing Champions In History | HowStuffWorks
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Which Countries Have the Most World Champions in Boxing History? - JD Sports
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Full list of current World Boxing Champions (July 2018)
Hugman's Lineal World Champions and their Championship Fights: Hugman, Barry J., Willis, Sean: 9781708370794: Amazon.com: Books
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