Não informado. (1971). Forestry Research Newsletter. Great Lakes Forest Research Centre.
Lua i Stíl Chicago (17ú heag.)Não informado. Forestry Research Newsletter. Sault Ste. Marie, Canada: Great Lakes Forest Research Centre, 1971.
Lua MLA (8ú heag.)Não informado. Forestry Research Newsletter. Great Lakes Forest Research Centre, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.