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Lua i Stíl Chicago (17ú heag.)Stonehenge and Its Environs: 3, Land-use Map [peta]. Edinburgh : Edinburgh Univ Pr., 1979.
Lua MLA (9ú heag.)Stonehenge and Its Environs: 3, Land-use Map [peta]. Edinburgh : Edinburgh Univ Pr., 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.