Information systems essentials 2026-02-15T18:39:38+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Haag, Stephen; Cummings, Maeve (McGraw-Hill/Irwin, 2006)