American Society of Civil Engineers. Horizontal Directional Drilling Design Guideline Task Committee, Skonberg, E. R., & Muindi, T. M. (2014). Pipeline design for installation by horizontal directional drilling (Second edition.). American Society of Civil Engneers.
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Chicago-referens (17:e uppl.)
American Society of Civil Engineers. Horizontal Directional Drilling Design Guideline Task Committee, Eric R. Skonberg, och Tennyson M. Muindi. Pipeline Design for Installation by Horizontal Directional Drilling. Second edition. Reston, Virginia: American Society of Civil Engneers, 2014.
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MLA-referens (9:e uppl.)
American Society of Civil Engineers. Horizontal Directional Drilling Design Guideline Task Committee, et al. Pipeline Design for Installation by Horizontal Directional Drilling. Second edition. American Society of Civil Engneers, 2014.
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Varning: dessa hänvisningar är inte alltid fullständigt riktiga.