билетов РФ (页面存档备份,存于互联网档案馆) Рубли России и СССР (页面存档备份,存于互联网档案馆) Russian Currencyна сайте destinationrussia.com(页面存档备份,存于互联网档案馆)(英文) Sovjet-Unie: de nieuwe
[2014-12-20]. (原始内容存档于2019-12-03). United States dollar (USD) and Kyrgyzstani som (KGS) Year 2013 Exchange Rate History and graphs and charts - Yahoo Finance
currency manipulation would be hard to enforce (in part because it is impossible to tell whether a currency is overvalued or undervalued); "currency manipulation"