NELSON, E. B. Well cementing#Editor Erik B. Nelson. Schlumberger Educational Services.
Lua i Stíl Chicago (17ú heag.)NELSON, Erik B. Well Cementing#Editor Erik B. Nelson. Schlumberger Educational Services.
Lua MLA (8ú heag.)NELSON, Erik B. Well Cementing#Editor Erik B. Nelson. Schlumberger Educational Services.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.