Gaya APA

Service, P, E., Contra, I, A, O, D. (1976). Lessons in rotary drilling. unit V lesson 2. spread mooring systems. (1976). : Texas:Petroleum Extension Service, (PETEX),.

Gaya MLA

Service, Petroleum, Extension., Contra, Inter., Ass., Of, Drilling. "Lessons in rotary drilling. unit V lesson 2. spread mooring systems.". 1976 : Texas:Petroleum Extension Service, (PETEX),, 1976. Text.