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Hélder Arruda Tham khảo|publisher=
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WikiPedia: Hélder Arruda http://www.lpfp.pt/segunda_liga/pages/jogador.aspx... http://www.lpfp.pt/segunda_liga/pages/jogo.aspx?ep... http://www.lpfp.pt/taca_liga/pages/jogo.aspx?epoca... https://int.soccerway.com/players/helder-filipe-al... https://www.thefinalball.com/player.php?id=225005 https://www.foradejogo.net/player.php?player=19930... https://www.wikidata.org/wiki/Q16148300#P3046 https://www.wikidata.org/wiki/Q16148300#P3047