TY - RPRT TI - Gamma-rays from cosmic ray interactions in supernova shells AU - Harding, A. K. AU - Mastichiadis, A. AU - Protheroe, R. J. AU - Szabo, A. P. PY - 1991 UR - https://ntrs.nasa.gov/citations/19920054195 ID - 19920054195 ER -