@misc{indiciae3410951c2987,
  title = {Preliminary geologic map and coal deposits of the southwest quarter of the Nipple Butte quadrangle, Kane County, Utah and Coconino County, Arizona},
  author = {Henry A. Waldrop and Robert L. Sutton and Utah Geological and Mineralogical Survey},
  year = {1967},
  url = {https://pubs.usgs.gov/publication/70046191},
  note = {Source identifier: 70046191}
}