Marketing research 2026-02-15T22:43:34+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Aaker, David A.; Day, George S.; Kumar, V., 1957 (John Wiley & Sons, 2004)