Searching for extragalactic supernova remnants. Smith, R. C. ; Blair, W. P. ; Kirshner, R. P. ; Long, K. S. ; Winkler, P. F. Abstract Publication: Revista Mexicana de Astronomia y Astrofisica, vol. 26 Pub Date: October 1993 Bibcode: 1993RMxAA..26..114S