Polish publications
Marcin Madejski and Tomasz Walkowicz (National Bank of Poland) - Selected graphic designs of banknotes of the National Bank of Poland - from the numismatic collection of the National Bank of Poland, Warsaw, no ISBN
157 A4 pages, softcover, very interesting work showing a lot of unrealized banknote designs (and also, for comparison, the realized ones), the album also contains other variants of circulating banknotes, from which only one was selected for issuance
