Não informado. (1964). IBP news. International Council of Scientific Unions, Special Committee for the International Biological Programme.
Lua i Stíl Chicago (17ú heag.)Não informado. IBP News. London: International Council of Scientific Unions, Special Committee for the International Biological Programme, 1964.
Lua MLA (8ú heag.)Não informado. IBP News. International Council of Scientific Unions, Special Committee for the International Biological Programme, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.