Solar Flare Gamma-Ray and Hard X-ray Imaging with the GRID-on-a-Balloon Orwig, L. E. ; Crannell, C. J. ; Dennis, B. R. ; Starr, R. ; Hurford, G. J. ; Prince, T. A. ; Hudson, H. S. ; van Beek, F. ; Greene, M. E. ; Johnson, W. N. ; Norris, J. P. ; Wood, K. S. ; Davis, J. M. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: March 1989 Bibcode: 1989BAAS...21..861O