Evidence of strong earthquake shaking in the lower Wabash Valley from prehistoric liquefaction features - Obermeier, S. F.; Bleuer, N.R.; Munson, C.A.; Munson, P.J.; Martin, W.S.; McWilliams, K.M.; Tabaczynski, D.A.; Odum, J.; Rubin, M.; Eggert, Donald (Science, 1991)