Solar Flares in Boulder Active Region No. 2372 during April 7-13 1980 Bhatnagar, A. ; Jadhav, D. B. ; Jain, R. M. ; Shelke, R. N. ; Purohit, S. P. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: September 1980 Bibcode: 1980BAAS...12..899B