Calculus : single variable 2026-02-16T09:55:18+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Anton, Howard; Bivens, Irl; Davis, Stephen, 1952- (Wiley ; John Wiley [distributor], 2009)