Citation:
Ryan J, Forrest D, Lockwood J, LOOMIS M, McConnell M, Morris D, WEBBER W, Bennett K, Hanlon L, Winkler C, et al. Neutron and gamma-ray measurements of the solar flare of 1991 June 9, in High-Energy Solar Phenomena - a New Era of Spacecraft Measurements. Vol 294. ; 1994 :89–93.