http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Uppsala general catalogue of galaxies, data for 12,921 galaxies north of S=-2 30'
"Presented to the Royal Society of Sciences of Uppsala, September 17th 1971.".
Uppsala Universitet. Acta Universitatis Upsaliensis
Vetenskaps-societeten i Upsala. Nova acta ser. 5: A, v. 1