@book{21672,
	author = {Parsons, Keith M.,},
	title = {Copernican questions : },
	publisher = {McGraw-Hill, },
	year = {2005.},
	address = {Boston : },
	note = {Includes index},
	url = {http://www.loc.gov/catdir/enhancements/fy0625/2005052216-b.html}
}