1 S.L. Hawley, G.H. Fisher, T.. Simon, S.L. Cully, S.E. Deustua, M.. Jablonski, C.M. Johns-Krall, B.R. Pettersen, V.. Smith, W.J. Spiesman, and J.A. Valenti, The Astrophysical Journal 453, (1995).
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