Ralf Siebenmorgen,
ISO Science Operations Centre, Astrophysics Division of ESA,
Villafranca del Castillo, P.O. Box 50727, 28080 Madrid, Spain
Marc Sauvage,
CEA, DSM/DAPNIA, CE-Saclay, F-91191 Gif-sur-Yvette Cedex, France
Deborah Levine,
ISO Science Operations Centre, Astrophysics Division of ESA,
Villafranca del Castillo, P.O. Box 50727, 28080 Madrid, Spain
and The Infrared Processing & Analysis Center,
Jet Propulsion Laboratory & California Institute of Technology
July 26, 1996