Não informado. (1968). Wood science. Forest Products Research Society.
Lua i Stíl Chicago (17ú heag.)Não informado. Wood Science. Madison, Wis: Forest Products Research Society, 1968.
Lua MLA (8ú heag.)Não informado. Wood Science. Forest Products Research Society, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.