Metamagical themas : questing for the essence of mind and pattern 2026-02-15T10:34:06+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Hofstadter, Douglas R. (Basic Books, 1985)