1.
Consider Luxembourg
La méthode Hollande
28 August–9 September 1978 Electrons in disordered metals and at metallic surfaces, Gent, Belgium
2.
1963 July 29th – August 9th Ghent, Belgium
August 12th – August 31st Mol, Belgium
16–28 July 1979 Theoretical aspects and new developments in magneto-optics, Antwerpen, Belgium
Physics of non-crystalline solids, Delft, The Netherlands
Third International Conference on Vapour Growth and Epitaxy, Amsterdam, The Netherlands 18–21 August 1975
6–10 September International conference on magnetism, ,Amsterdam, The Netherlands
One-dimensional carbon chains encapsulated in hollandite