Development in rich and poor countries: a general theory with statistical analyses 2026-02-16T10:07:11+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Kristensen, Thorkil, 1899- (Praeger special studies in international economics and development, 1974)