Allan, J. (1978). "The Black Speech". In Allan, J. (ed.). An Introduction to Elvish (reprinted 2002 ed.). Helios: Bran's Head Books. p. 167. ISBN0905220102.
"Orodruin". Metal Archives. Retrieved 17 November 2020.
nasa.gov
Talbert, Tricia (1 October 2015). "Pluto's Big Moon Charon Reveals a Colorful and Violent History". NASA. Retrieved 19 August 2020. Charon's color palette is not as diverse as Pluto's; most striking is the reddish north (top) polar region, informally named Mordor Macula.