Não informado. (1956). Fertilizer solutions. National Fertilizer Solutions Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Fertilizer Solutions. Peoria, Ill: National Fertilizer Solutions Association, 1956.
Lua MLA (8ú heag.)Não informado. Fertilizer Solutions. National Fertilizer Solutions Association, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.