@misc{indiciae6231f012d732,
  title = {Relations of zoned pegmatites to other pegmatites, granite, and metamorphic rocks in the southern Black Hills, South Dakota},
  author = {J.J. Norton and J. A. Redden},
  year = {1990},
  url = {https://pubs.usgs.gov/publication/70015906},
  note = {Source identifier: 70015906}
}