Mathematical sociology 2026-02-16T12:07:26+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Leik, Robert K.; Meeker, Barbara Foley (Prentice-Hall methods of social sciences series, 1975)