Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
University of Texas at Austin. Petroleum Extension Service and Association of Drilled Shaft Contractors (U.S.),"Buoyancy, stability and trim",,"Petroleum Extension Service, University of Texas at Austin",1976,Rotary drilling,,0886980712,,https://cir.nii.ac.jp/crid/1130000794394540032