01037nas 22003733 450 99621197770331620230222213018.02328-8256(OCoLC)60623396(CKB)111021046613420(CONSER)--2013200309(EXLCZ)9911102104661342020050614b19992020 --- aengur|||||||||||txtrdacontentcrdamediacrrdacarrierNational drillerTroy, MI :Business News Publishing CompanyTroy, MI :BNP Media II, L.L.C.1 online resource1527-1501 Natl. drill.Oil well drillingPeriodicalsOil well drillingfast(OCoLC)fst01044853Periodicals.fastOil well drillingOil well drilling.621.952JOURNAL996211977703316National driller2403467UNISA