Einstein Imaging Proportional Counter (I. P. C. ) Observations of the Supernova Remnant HB3 Leahy, D. A. ; Venkatesan, D. ; Galas, C. M. F. ; Naranan, S. ; Long, K. Abstract Publication: Bulletin of the American Astronomical Society Pub Date: September 1983 Bibcode: 1983BAAS...15..953L