Speckle Interferometric Observations of Pallas Hege, E. K. ; Cocke, W. J. ; Hubbard, E. ; Gresham, M. ; Strittmatter, P. A. ; Worden, S. P. ; Radick, R. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: March 1980 Bibcode: 1980BAAS...12R.509H