Schaums outline of theory and problems of discrete mathematics 2026-02-16T02:35:36+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Lipschutz, Seymour; Lipson, Marc (Schaums outline series, 2007)