@misc{indiciaecd961890758a,
  title = {Analyses of core samples collected in Virginia 1978-1980},
  author = {J.A. Henderson and G.P. Wilkes and L. J. Bragg and C.L. Oman},
  year = {1984},
  doi = {10.3133/ofr84496},
  url = {https://pubs.usgs.gov/publication/ofr84496},
  note = {Source identifier: ofr84496}
}