@book{4658,
	author = {Nilson, Peter},
	title = {Uppsala general catalogue of galaxies data for 12.921 galaxies north of 0=-2 degree30},
	publisher = {Acta Universitatis Upasaliensis},
	year = {1973},
	series = {Nova acta regia societatis scientiarum upsaliensis ser v: A.},
	address = {Uppsala}
}