Incoming Resources
- M. Nijhoff, The Hague, 1955
- M. Nijhoff, The Hague, 1962
- M. Nijhoff, distributors for the U.S. and Canada, Kluwer Boston, The Hague, Boston, Hingham, MA, 1981
- M. Nijhoff, The Hague, Boston, 1979
- M. Nijhoff, The Hague, 1975
- M. Nijhoff, The Hague, 1977
- M. Nijhoff, The Hague, 1973
- M. Nijhoff, The Hague, 1964, 1961