Não informado. (1959). Monthly Statistics of Foreign Trade. Organization for Economic Co-Operation and Development, Department of Economic and Statistics.
Lua i Stíl Chicago (17ú heag.)Não informado. Monthly Statistics of Foreign Trade. Paris: Organization for Economic Co-Operation and Development, Department of Economic and Statistics, 1959.
Lua MLA (8ú heag.)Não informado. Monthly Statistics of Foreign Trade. Organization for Economic Co-Operation and Development, Department of Economic and Statistics, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.