Não informado. (1950). Forest Resource Report. U.S. Department of Agriculture, Forest Service.
Lua i Stíl Chicago (17ú heag.)Não informado. Forest Resource Report. Washington: U.S. Department of Agriculture, Forest Service, 1950.
Lua MLA (8ú heag.)Não informado. Forest Resource Report. U.S. Department of Agriculture, Forest Service, 1950.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.