| Answer | Crossword Clue |
|---|---|
| OPEC | Big oil gp. |
| OPEC | Oil gp. |
| OPEC | Oil pricing gp. |
| OPEC | Oil nations' gp. |
| OPEC | Oil-exporting gp. |
| OPEC | Oil-producers' gp. |
| OPEC | Oil-rich gp. |
| OPEC | 12-member oil gp. |
| OPEC | Oil gp. since 1960 |
| EPA | Gp. concerned with oil spills |
| OPEC | Gp. of oil-producing nations |
| OPEC | Gp. in the oil field |
| OPEC | Oil gp. headquartered in Vienna |
| OPEC | Oil gp. with 12 member nations |
| OPEC | Gp. that publishes the Monthly Oil Market Report |
