@misc{indiciae5ca55527d9bd,
  title = {Spectrographic analyses of insoluble-residue samples, Joplin 1 degree x 2 degrees quadrangle, Kansas and Missouri : drill hole nos. 13, 14, and 15},
  author = {John H. Bullock and Helen A. Whitney},
  year = {1989},
  doi = {10.3133/ofr89215},
  url = {https://pubs.usgs.gov/publication/ofr89215},
  note = {Source identifier: ofr89215}
}