Zook, H. A. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Gruen, E. (Max-Planck-Inst. fuer Kernphysik Heidelberg, Germany)
Baguhl, M. (Max-Planck-Inst. fuer Kernphysik Heidelberg, Germany)
Balogh, A. (Imperial Coll. of Science and Technology London, United Kingdom)
Bame, S. J. (Los Alamos National Lab. NM., United States)
Fechtig, H. (Max-Planck-Inst. fuer Kernphysik Heidelberg, Germany)
Forsyth, R. (Imperial Coll. of Science and Technology London, United Kingdom)
Hanner, M. S. (Jet Propulsion Lab. California Inst. of Tech., Pasadena., United States)
Horanyi, M. (Colorado Univ. Boulder., United States)
Kissel, J. (Max-Planck-Inst. fuer Kernphysik Heidelberg, Germany)