The Banknote Book is a new catalog of world paper money and an excellent alternative to Krause's ("Pick") catalog, officially known as the Standard Catalog of World Paper Money (SCWPM). This catalog is a superb source for accurate information, descriptions, and quality images. Published by Owen W. Linzmayer, The Banknote Book is available as PDF files sold by subscription or individually by chapter.

A Third Party Grading (TPG) Service specializing in grading of world banknotes. Owned and directed by Dennis Lutz the company is dedicated to the accurate analysis, identification and preservation of world banknotes.

One of the largest auction houses offering specializing in World paper money.

One of the largest auction houses offering U.S. and World paper money.

Auction house located in New Jersey offering U.S. and World paper money.

One of the largest auction houses located in Kansas offering U.S. and World paper money.

One of the largest auction houses offering U.S. and World paper money.

An auction house located in Turkey offering World Paper money