Principles of economics 2026-02-15T19:49:39+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Ruffin, Roy.J; Gregory, Paul R (The Addison-Wesley series in economics, 2001)