National Digital Library DNNT (works not available on the market) provides access to digitalized documents (books, periodicals, newspaper, etc.) that were published on the territory of the Czech Republic until 1989, and simultaneously newer works that are not available on the market and/or they are not under Czech Copyright Act protection.
Access via icon “Přihlásit eduID” – click on “Univerzita Karlova” (Charles University) – CAS ID/pwd