Online information retrieval systems : an introductory manual to principles and practice 2026-02-15T19:14:45+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Houghton, B. (Bernard), 1935-1985; Convey, John (Clive Bingley, 1984)