Lepointe, Gabriel
[Author];
Houwens Post, H.
[Author];
Janne d'Othée, X.
[Author];
Schaap, H.P
[Author];
Warlomont, René
[Author];
Feenstra, Robert
[Author];
Spijkerboer, G.
[Author];
Fockema Andreae, S. J.
[Author];
Feuchère, P.
[Author];
Den Tex, Jan
[Author];
Dereine, Charles
[Author];
Dieleman, P.
[Author]