Gaya APA

Service, P, E., Contra, I, A, O, D. (1981). Lessons in rotary drilling. Unit I Lesson 5 the hoisting tools : blocks, hook, and wire line. The blocks and drilling line (1981). : Texas : Petroleum Extension Service (PETEX),.

Gaya MLA

Service, Petroleum, Extension., Contra, Inter., Ass., Of, Drilling. "Lessons in rotary drilling. Unit I Lesson 5 the hoisting tools : blocks, hook, and wire line. The blocks and drilling line". 1981 : Texas : Petroleum Extension Service (PETEX),, 1981. Text.