@book{17561,
	author = {Fournier, Hugo},
	title = {Coal geology research progress},
	publisher = {Nova Science Publishers,},
	year = {c2008},
	address = {New York :},
	url = {http://www.netlibrary.com.libraryumpsa.idm.oclc.org/urlapi.asp?action=summary&v=1&bookid=283868}
}