Não informado. (1926). Fertilizer review. National Fertilizer Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Fertilizer Review. Washington: National Fertilizer Association, 1926.
Lua MLA (8ú heag.)Não informado. Fertilizer Review. National Fertilizer Association, 1926.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.