Discrete mathematics : an introduction to proofs and combinatorics 2026-02-15T21:40:43+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Ferland, Kevin K., 1969- (Houghton Mifflin Co., 2009)