Não informado. (1964). Research paper. U.S. Forest Service.
Lua i Stíl Chicago (17ú heag.)Não informado. Research Paper. Juneau, Alaska: U.S. Forest Service, 1964.
Lua MLA (8ú heag.)Não informado. Research Paper. U.S. Forest Service, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.