COBE: The Differential Microwave Radiometers Smoot, G. F. ; Bennett, C. L. ; Gulkis, S. ; Janssen, M. A. ; Lubin, P. L. ; Wilkinson, D. T. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: September 1989 Bibcode: 1989BAAS...21.1220S