Introduction to information systems 2026-02-15T21:24:01+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - O'Brien, James A., 1936; Marakas, George M. (McGraw-Hill/Irwin, 2008)