@book{7351,
	author = {Gordon, Richard L.,},
	title = {World coal :},
	publisher = {Cambridge University Press,},
	year = {1987.},
	address = {Cambridge [Cambridgeshire] ;},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy1005/86026349-d.html}
}