Petroleum engineer international
- (Mar. 1983) ; 52 p.
Drilling contractors with rotary land rigs in U.S. -- U.S. contract rotary land drilling rigs -- Drilling contractors with rotary land rigs in Canada -- Canadian contract rotary land drilling rigs -- International rotary land drilling contractors -- International contract rotary land drilling rigs.
Drilling contractors with rotary land rigs in U.S. -- U.S. contract rotary land drilling rigs -- Drilling contractors with rotary land rigs in Canada -- Canadian contract rotary land drilling rigs -- International rotary land drilling contractors -- International contract rotary land drilling rigs.