Butler, T. M. [P:(DE-HGF)0] ; Lawrence, M. G. [P:(DE-HGF)0] ; Gurjar, B. R. [P:(DE-HGF)0] ; van Aardenne, J. [P:(DE-HGF)0] ; Schultz, M. [P:(DE-Juel1)6952] ; Lelieveld, J. [P:(DE-Juel1)VDB920]