- Organisation for Economic Co-operation and Development. Road Transport Research Programme (3)
- Bebel, August, 1840-1913 (1)
- Bernstein, Eduard, 1850-1932 (1)
- Engels, Friedrich, 1820-1895 (1)
- Glaser, Barney G. (1)
- Hildenbrand, Bruno (1)
- Hirsch, Helmut, 1907- (1)
- Kaufmann, Stefan (1)
- Kautsky, Karl Johann, 1854-1938 (1)
- Klemp, Egon (1)
- Liebling, Thomas M. (1)
- Organisation for Economic Co-operation and Development (1)
- Paul, Axel T. (1)
- Seidl, Christian (1)
- Selten, Reinhard, 1930- (1)
- Strauss, Anselm L. (1)