@misc{indiciae4ae6c4f03724,
  title = {Spectrographic analyses of insoluble-residue samples, Harrison 1 degree x 2 degrees quadrangle, Missouri and Arkansas : drill holes nos. 45, 46, 47, 48 and 49},
  author = {Barbara Chazin and M. S. Erickson},
  year = {1988},
  doi = {10.3133/ofr88446},
  url = {https://pubs.usgs.gov/publication/ofr88446},
  note = {Source identifier: ofr88446}
}