Não informado. (1972). Ground water newsletter. Water Information Center.
Lua i Stíl Chicago (17ú heag.)Não informado. Ground Water Newsletter. Washington: Water Information Center, 1972.
Lua MLA (8ú heag.)Não informado. Ground Water Newsletter. Water Information Center, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.