@misc{indiciae689c48138faa,
  title = {E-4 Central Kentucky to the Carolina Trough},
  author = {Douglas W. Rankin and William P. Dillon and D.F.B. Black and S.E. Boyer and David L. Daniels and R. Goldsmith and J. A. Grow and J. Wright Horton and Deborah R. Hutchinson and Kim D. Klitgord and R. C. McDowell and D.J. Milton and J. P. Owens and Jeffrey D. Phillips and K.C. Bayer and John R. Butler and D.W. Elliott and Robert C. Milici},
  year = {1991},
  doi = {10.1130/dnag-cot-e-4},
  url = {https://pubs.usgs.gov/publication/70196847},
  note = {Source identifier: 70196847}
}