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The article by Ellingham is cited without its title, which is "Reducibility of oxides and sulfides in metallurgical processes" or "Reducibility of oxides and sulphides in metallurgical processes" depending on the choice of spelling. I am not a registered editor so I cannot make this change myself as the article is semi-protected. Hope this helps. ^[1] 147.188.254.167 ( talk) 10:58, 20 October 2016 (UTC) reply

Done. Thanks for looking up the title. Dirac66 ( talk) 01:41, 22 April 2017 (UTC) reply