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Submitted URL: http://www.math.niu.edu///~rusin//known/-math//index//28/-xx.html
Effective URL: https://www.niu.edu/404.asp?Host=math&Path=~rusin/known/-math/index/28/-xx.html
Submission: On August 15 via api from US — Scanned from DE
Effective URL: https://www.niu.edu/404.asp?Host=math&Path=~rusin/known/-math/index/28/-xx.html
Submission: On August 15 via api from US — Scanned from DE
DOM tree The "DOM" is the Document Object Model