Theories of surplus-value: volume IV of Capital 2026-02-15T17:30:22+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Marx, Karl, 1818-1883 (Foreign Languages Pub. House, 1963)