* {{citeবই bookউদ্ধৃতি | last = Walter Licht| first = Thomas Dublin| year = 2005 | title = The Face of Decline: The Pennsylvania Anthracite Region in the Twentieth Century | publisher = Cornell University Press | isbn = 0-8014-8473-1 | oclc = 60558740}}
* {{citeবই bookউদ্ধৃতি |last= Long|first= Priscilla |title= Where the Sun Never Shines: A History of America's Bloody Coal Industry |year= 1991 |publisher= Paragon House |location= New York, NY |isbn= 1557784655 |oclc= 25236866 }}
* {{citeবই bookউদ্ধৃতি | last = Rottenberg | first = Dan | year = 2003 | title = In the Kingdom of Coal; An American Family and the Rock That Changed the World | publisher = Routledge | isbn = 0-415-93522-9 | oclc = 52348860}}
* {{cite journal | author=Robert H. Williams and Eric D. Larson | title=A comparison of direct and indirect liquefaction technologies for making fluid fuels from coal | journal=Energy for Sustainable Development | month=December | year=2003 | volume=VII | pages=103–129 | url= http://www.ieiglobal.org/ESDVol7No4/dclversussicl.pdf | format = PDF}}
