@book{187682,
	author = {Terzian, Yervant},
	title = {El universo de Carl Sagan},
	publisher = {Cambridge University Press},
	year = {1999.},
	address = {España},
	note = {Papers presented at a symposium held in October, 1994, at Cornell University in honor of Carl Sagan's sixtieth birthday.},
	url = {http://www.loc.gov/catdir/toc/cam023/96040511.html}
}