Related Clues:

• Beer holders: Abbr.
• Crude meas.
• OPEC units
• OPEC units: Abbr.
• Crude containers: Abbr.
• OPEC amounts, briefly
• OPEC amts.
• Oil qty.
• Ener.-related units
• OPEC output
• Crude qty.
• Middle East meas.
• Oil meas
• OPEC measures
• Energy-related units: Abbr