- Publication venue
- Publication date
- 01/01/1972
- Field of study
- Publication venue
- Publication date
- 01/01/1976
- Field of study
- Publication venue
- Publication date
- Field of study
Economics; Transport; Technolog
- Publication venue
- Publication date
- 01/01/1971
- Field of study
- Publication venue
- Publication date
- 01/01/1972
- Field of study
- Publication venue
- Publication date
- 01/01/1976
- Field of study
- Publication venue
- The Netherlands Organization for the Advancement of Pure Research
- Publication date
- 01/01/1972
- Field of study
- Publication venue
- Publication date
- 01/01/1971
- Field of study
- Publication venue
- Publication date
- 01/01/1971
- Field of study