@misc{indiciae2f18d9895cab,
  title = {Modal compositions, whole-rock chemical data and normative mineralogy, and minor element data for rocks from alkaline intrusive complexes in northwestern Montana},
  author = {T.J. Armbrustmacher},
  year = {1987},
  doi = {10.3133/ofr87368},
  url = {https://pubs.usgs.gov/publication/ofr87368},
  note = {Source identifier: ofr87368}
}