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Radar Reconnaissance of 99942 Apophis
Brozovic, Marina; Benner, L. A. M.; Naidu, S. P.; Busch, M. W.; Giorgini, J. D.; Taylor, P. A.; Rivera-Valentin, E. G.; Virkki, A. K.; Venditti, F. C. F.; Marshall, S. E.; Nolan, M.C.; Howell, E. S.