@book{690,
	author = {Rich, Elaine. and Knight, Kevin.},
	title = {Artificial intelligence /},
	publisher = {McGraw-Hill,},
	year = {c1991.},
	address = {New York:},
	edition = {2nd ed.},
	note = {Includes bibliographical references (p. 583-611) and index.},
	url = {http://www.loc.gov/catdir/description/mh022/90020608.html}
}