@book{9104,
	author = {Colloquium on Trees in Algebra and Programming and Courcelle, B.},
	title = {Ninth Colloquium on Trees in Algebra and Programming :},
	publisher = {Cambridge University Press,},
	year = {1984.},
	address = {Cambridge [Cambridgeshire] ;},
	url = {http://www.loc.gov/catdir/description/cam031/84045246.html}
}