BBL
| Date | Clue |
|---|---|
| 2022-12-17 | Crude meas. |
| 2021-05-19 | OPEC unit: Abbr. |
| 2017-09-07 | OPEC units: Abbr. |
| 2011-05-03 | OPEC units: Abbr. |
| 2010-07-11 | OPEC unit: Abbr. |
| 2006-07-22 | Crude container?: Abbr. |
| 2004-07-25 | Oil shipment: Abbr. |
| 1999-07-31 | Tankerload: Abbr. |
| 1998-02-24 | Unit of oil production: Abbr. |
| 1998-01-17 | Crude meas. |
| 1997-01-30 | Oil measure: Abbr. |
| 1996-09-11 | Petroleum meas. |