Proceedings of the Workshop on sound propagation in forested areas and shelterbelts : Nijmegen, the Netherlands, 3-6 march 1986 / ed.: M.J.M. MartensCursus plantenecologie : handleiding autecologische en ecofysiologische experimenten / M.E. Scholten, M.J.M. MartensWorkshop on sound propagation in forested areas and shelterbelts, Nijmegen, 3-6 March 1986 : program and abstracts of papers to be presented / ed.: M.J.M. Martens