1990 SA Stevens, B. L. ; Larson, S. ; Beshore, E. ; Christensen, E. ; Hill, R. ; Kolar, S. ; McLean, D. ; Birtwhistle, P. ; Spahr, T. B. Abstract Publication: Minor Planet Electronic Circulars Pub Date: March 2004 Bibcode: 2004MPEC....E...12S