Measurement and evaluation in education and psychology 2026-02-16T08:49:51+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Mehrens, William A.; Lehmann, Irvin J. (Holt, Rinehart and Winston, 1973)