Grammaire de la langue kiluba-hemba, telle qu'elle est parlée par les Baluba de l'est, Katanga. Par J. Vandermeiren
Phenological weighting of ozone exposures in the calculation of critical levels for non-woody species
Air Pollution Research Report 46; Effects of Air Pollution on Agricultural Crops in Europe; Proceedings of the Final Symposium of the European Open-Top Chambers Project, Tervuren, Belgium, 23-25 November 1992