German emergency tokens and paper money
http://www.geiger-verlag.de/

Find out about German paper money, history and facts about German banknotes and their historical context. A vast amount of banknotes have been issued in Germany and its regions.
http://www.germannotes.com/

Collectible US large size silver certificates, woodchoppers, federal reserve notes, federal reserve bank notes, and national currency.
http://www.greatoldnotes.com/