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WikiPedia: Cây_General_Sherman http://www.forestgiants.com/thetrees4.htm http://www.mdvaden.com/redwood_crannell_creek_gian... http://www.sfgate.com/cgi-bin/article.cgi?f=/c/a/2... http://sierranaturenotes.com/naturenotes/SequoiaAg... http://www.nps.gov/seki/naturescience/sherman.htm http://books.google.co.il/books?id=rDCsAAAAIAAJ&pg... http://www.landmarktrees.net/elam.html http://48hillsonline.org/2014/08/27/karl-marx-tree... http://www.conifers.org/cu/se/index.htm http://www.conifers.org/pi/Pinus_longaeva.php