Não informado. (1919). Department circular. U.S. Department of Agriculture.
Lua i Stíl Chicago (17ú heag.)Não informado. Department Circular. Washington: U.S. Department of Agriculture, 1919.
Lua MLA (8ú heag.)Não informado. Department Circular. U.S. Department of Agriculture, 1919.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.