Anthracite (English Wikipedia)

Quinn, A.W.; Glass, H.D. (1958). "Rank of Coal and Metamorphic Grade of Rocks of the Narragansett Basin of Rhode Island". Economic Geology. 53 (5): 563–576. Bibcode:1958EcGeo..53..563Q. doi:10.2113/gsecongeo.53.5.563.

eia.gov

Quinn, A.W.; Glass, H.D. (1958). "Rank of Coal and Metamorphic Grade of Rocks of the Narragansett Basin of Rhode Island". Economic Geology. 53 (5): 563–576. Bibcode:1958EcGeo..53..563Q. doi:10.2113/gsecongeo.53.5.563.

Urbina, Ian (June 10, 2008). "King Coal Country Debates a Sacrilege, Gas Heat". The New York Times. Retrieved June 21, 2008.

"anthracite". The Oxford English Dictionary (2nd ed.). Oxford University Press. 1989. Retrieved 2010-06-26.

Ashley, George H. (December 1945). "Anthracite Reserves". PAGS Progress Reports and Bulletins (130). Archived from the original on 2020-08-09. Retrieved 2019-05-16.

"Coal explained". U.S. Energy Information Administration. Archived from the original on 2019-08-29. Retrieved 16 January 2022.
"MIN 454: Underground Mining Methods handout; from course at the University of Alaska Fairbanks". Archived from the original on 26 March 2009. Retrieved 2009-05-05.
"The Coal Resource: A Comprehensive Overview of Coal" (PDF). World Coal Institute. Archived from the original (PDF) on 15 October 2009.
"uksmokecontrolareas.co.uk". Archived from the original on 2009-02-07.
Petmin Annual Report 2011 Archived May 5, 2012, at the Wayback Machine
Ashley, George H. (December 1945). "Anthracite Reserves". PAGS Progress Reports and Bulletins (130). Archived from the original on 2020-08-09. Retrieved 2019-05-16.
"Atrum Coal Groundhog Project – Atrum Coal". atrumcoal.com. Archived from the original on 2012-06-17. Retrieved 2013-11-24.

Bauerman 1911, p. 105. Bauerman, Hilary (1911). "Anthracite" . In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 2 (11th ed.). Cambridge University Press. pp. 105–106.
Encyclopædia Britannica (1878). "Anthracite" . Encyclopædia Britannica. Vol. 2 (9th ed.). 1878. p. 106.
Bauerman 1911, pp. 105–106. Bauerman, Hilary (1911). "Anthracite" . In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 2 (11th ed.). Cambridge University Press. pp. 105–106.
Bauerman 1911, p. 106. Bauerman, Hilary (1911). "Anthracite" . In Chisholm, Hugh (ed.). Encyclopædia Britannica. Vol. 2 (11th ed.). Cambridge University Press. pp. 105–106.

"The Coal Resource: A Comprehensive Overview of Coal" (PDF). World Coal Institute. Archived from the original (PDF) on 15 October 2009.