Litteratur
Collection of Russian numismatic litterature, incl. Petrov, Catalogue des Monnaies Russes; Brekke, The Copper Coinage of Imperial Russia; Severin, The Silver Coinage of Imperial Russia, 1682 to 1917; Sotnikova og Spasski, Russian Coins of the X-XI Centuries as well as litterature about wire money, in total 10 pcs