E-4 Central Kentucky to the Carolina Trough - Rankin, Douglas W.; Dillon, William; Black, D.F.B.; Boyer, S.E.; Daniels, David; Goldsmith, R.; Grow, J.; Horton Jr., J.; Hutchinson, Deborah; Klitgord, Kim; McDowell, R. C.; Milton, D.J.; et al. (Geological Society of America, 1991)