Schaum's outline of theory and problems of Fourier analysis, with applications to boundary value problems 2026-02-16T02:13:50+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Spiegel, Murray R. (Schaum's outline series, 1974)