Não informado. (1950). Apicultural Abstracts. International Bee Research Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Apicultural Abstracts. London: International Bee Research Association, 1950.
Lua MLA (8ú heag.)Não informado. Apicultural Abstracts. International Bee Research Association, 1950.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.