Não informado. Oil and Gas Investigations. State Geological Survey.
Lua i Stíl Chicago (17ú heag.)Não informado. Oil and Gas Investigations. Lawrence, Kan: State Geological Survey.
Lua MLA (8ú heag.)Não informado. Oil and Gas Investigations. State Geological Survey.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.