Petroleum engineer international
- (Sep. 1983) ; 40 p.
Drilling outlook -- 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 outlook -- 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.