Não informado. (1939). Biological abstracts. Union of American Biological Societies.
Lua i Stíl Chicago (17ú heag.)Não informado. Biological Abstracts. Philadelphia, Pa: Union of American Biological Societies, 1939.
Lua MLA (8ú heag.)Não informado. Biological Abstracts. Union of American Biological Societies, 1939.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.