Astronomy, principles and practice 2026-02-15T22:04:14+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Roy, A. E. (Archie E.), 1924-; Clarke, D. (David), 1936- (Hilger, 1977)