@book{118081,
	author = {Karas, G. Brian},
	title = {On earth },
	publisher = {Puffin Books},
	year = {2005},
	address = {New York},
	note = {IB Program. Uso restrito aos professores.},
	url = {http://www.loc.gov/catdir/enhancements/fy1204/2004018204-d.html}
}