http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Commission of the Protection of the Black Sea Against Pollution 1st Biannual Scientific Conference Black Sea ecosystem 2005 and beyond : abstracts, 8-10 May 2006, İstanbul
Commission of the Protection of the Black Sea Against Pollution Biannual Scientific Conference (1. : 2006 : İstanbul)