"Oil reservoir engineering." . . "Erdöllagerstätte." . . "Petrol mühendisliği." . . "Petroleum engineering." . . . . "Ingenieurgeologie." . . "Inżynieria ropy naftowej." . . "Erdöl." . . "Petrol rezervuar mühendisliği." . . "Erdgaslagerstätte." . . . . . . . . . . . . . . . . . . "Petroleum engineering, Geology of petroleum" . . . . . . . . "Petroleum engineering" . "Petroleum engineering"@en . . . . . "Petroleum engineering : Geology of petroleum 3" . . . . . . . . . "Erdgasgewinnung." . . "Ropa naftowa geologia." . . "Pétrole, Technique du." . . "Erdölgewinnung." . .