Subject
- Concessions[remove]118
- Pearl industry and trade44
- Petroleum industry20
- Oil17
- Oil extraction12
- Mining9
- Foreign relations7
- Bilateral relations5
- Boundaries5
- Ferric oxide5
- Railways5
- Concessions, red oxide, Abu Musa4
- Frontiers4
- Imperialism4
- Indentured labour4
- Armed forces3
- Education3
- Indo-European Telegraph Line3
- Piracy3
- Reports3