@misc{indiciae6e3aa6f51f59,
  title = {Spectrographic analyses of insoluble-residue samples, in and adjacent to the Joplin 1 degree x 2 degrees Quadrangle, Kansas and Missouri; drill hole Nos. 59, 60 and 61},
  author = {J. H. Bullock and H. A. Whitney},
  year = {1989},
  doi = {10.3133/ofr89536},
  url = {https://pubs.usgs.gov/publication/ofr89536},
  note = {Source identifier: ofr89536}
}