@book{4465,
	author = {Littmann, Mark, and Yeomans, Donald K.},
	title = {Comet Halley :},
	publisher = {American Chemical Society,},
	year = {1985.},
	address = {Washington, D.C. :},
	note = {Includes index.},
	url = {http://www.loc.gov/catdir/enhancements/fy0639/85004012-d.html}
}