Não informado. (1960). Main Economic Indicators. Department of Economics and Statistics.
Lua i Stíl Chicago (17ú heag.)Não informado. Main Economic Indicators. Paris: Department of Economics and Statistics, 1960.
Lua MLA (8ú heag.)Não informado. Main Economic Indicators. Department of Economics and Statistics, 1960.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.