- 運輸．交通--交通政策・行政・経営 (20)
- Urban transportation (2)
- Choice of transportation (1)
- Economic indicators (1)
- Environmental indicators (1)
- Highway planning--United States--Congresses (1)
- Local transit--Addresses, essays, lectures (1)
- Social indicators (1)
- Traffic flow--Mathematical models (1)
- Transportation and state (1)
- Transportation and state--United States--Addresses, essays, lectures (1)
- Transportation--Addresses, essays, lectures (1)
- Transportation--United States (1)
- 環境保全．自然保護 (1)