Não informado. Drilling mud. National Lead, Baroid Sales Division.
Lua i Stíl Chicago (17ú heag.)Não informado. Drilling Mud. Houston, Tex: National Lead, Baroid Sales Division.
Lua MLA (8ú heag.)Não informado. Drilling Mud. National Lead, Baroid Sales Division.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.