- 経済--経済政策.国際経済 (11)
- Organisation for Economic Co-operation and Development countries (9)
- Radiation--Safety measures (3)
- Business enterprises--OECD countries--Statistics (1)
- OECD countries--Statistics, Vital (1)
- Organisation for Economic Co-operation and Development coutries (1)
- 教育財政.教育費.私学助成.奨学制度.育英会 (1)
- no value (1)