Periodic comet Tempel 1 (1972a). Seki, T. ; Kojima, N. ; Rutter, G. H. ; Waterfield, R. L. ; Purcell, I. M. ; Petrovicová, R. ; Mrkos, A. ; Antal, M. Abstract Publication: International Astronomical Union Circular Pub Date: 1972 Bibcode: 1972IAUC.2410Q...1S