- Pavements--Developing countries--Maintenance and repair--Management (2)
- Roads--Developing countries--Maintenance and repair--Management (2)
- East-West trade (1945- )--Congresses (1)
- Energy industries--Congresses (1)
- General Agreement on Tariffs and Trade (Organization) (1)
- Petroleum industry and trade--Congresses (1)
- Produce trade--Developing countries (1)
- Produce trade--Government policy (1)
- Soviet Union--Economic conditions--1985- (1)
- Soviet Union--Economic policy--1986- (1)