@book{20990,
	author = {Dor-Ner, Zvi. and Scheller, William.},
	title = {Columbus and the age of discovery /},
	publisher = {W. Morrow,},
	year = {c1991.},
	address = {New York :},
	edition = {1st ed.},
	note = {Companion volume to the PBS television series of the same title.}
}