http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
European Committee for the Conservation of Nature and Natural Resources.
Cor J. Smit; Anne van Wijngaarden ; Edited by the European Committee for the Conservation of Natural Resources-Council of Europe
Supplementary volume of handbuch der saugetiere Europas