David. TheIron Bridge - How was it Built?. BBC. 2011-02-17 [2019-12-07]. (原始内容存档于2021-04-17). The arch has five parallel iron frames [...] The two arcs
Trautwein, A. X. Crown Thioether Chemistry of Iron(II/III). Synthesis and Characterization of Low-spin Bis(1,4,7-trithiacyclononane)iron(III) and crystal
Award的2002年最佳角色扮演遊戲。 本作是第二部授權使用中土設定的桌上角色扮演遊戲,第一部授權產品是IronCrown Enterprises的中土角色扮演遊戲(Middle-earth Role Playing)。 Decipher.com: The Lord of the Rings RPG