%0 conference paper,conference lecture %@ %A Ansmann, A.,Schulze, C.,Wandinger, U.,Weitkamp, C.,Michaelis, W. %D 1992 %J Sixteenth International Laser Radar Conference %N %P 7-10 %T Stratospheric backscatter, extinction and lidar ratio profiling after the Mt. Pinatubo eruptions %U %X