Never the same river twice : social change : a concept study 2026-02-15T17:52:44+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Hickman, Warren L; Fancett, Verna S (Concepts for social studies, 1975)