@misc{indiciae38eb73990a10,
  title = {Teaching aids for optical mineralogy in the geosciences},
  author = {D. E. Kile},
  year = {2008},
  doi = {10.1017/s1431927608081403},
  url = {https://pubs.usgs.gov/publication/70009750},
  note = {Source identifier: 70009750}
}