著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL University of Texas at Austin. Petroleum Extension Service and Association of Drilled Shaft Contractors (U.S.),Controlled directional drilling. revised,,"Petroleum Extension Service, University of Texas at Austin",1974,Rotary drilling,,,,https://cir.nii.ac.jp/crid/1130282272441042816