180 years of central banking in Poland

Catalogue of polish collector and occasional coins - Parchimowicz ...

Catalogue of polish coins - FISCHER 2009

Analysis of coin prices for the year 2009 with and without ...

NBP announcement about changes of prices gold coins (in ...

Nordic Gold coins in eNumi.pl (in polish)

Cataloque prices for year 2008 and auction prices

World's Biggest Coin - a Million Dollar value