Não informado. (1952). National fertilizer review. National Fertilizer Association.
Lua i Stíl Chicago (17ú heag.)Não informado. National Fertilizer Review. Washington: National Fertilizer Association, 1952.
Lua MLA (8ú heag.)Não informado. National Fertilizer Review. National Fertilizer Association, 1952.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.