The Magnetic Morphology of Chromospheric Particle Precipitation in Three October 1989 (AR 5747) Flares Leka, K. D. ; Canfield, R. C. ; Wülser, J. -P. ; Fan, Y. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: March 1990 Bibcode: 1990BAAS...22..824L