ISO LWS Spectroscopy of an Ultraluminous Infrared Galaxy: ARP 220 Fischer, J. ; Satyapal, S. ; Luhman, M. L. ; Stacey, G. J. ; Smith, H. A. ; Unger, S. J. ; Lord, S. D. ; Greenhouse, M. A. ; Spinoglio, L. Abstract Publication: Extragalactic Astronomy in the Infrared Pub Date: 1997 Bibcode: 1997eai..proc..289F