@misc{indiciae0c3054537407,
  title = {Contribution to the petrography of Haleakala Volcano, Hawaii},
  author = {G. A. Macdonald and H. A. Powers},
  year = {1946},
  doi = {10.1130/0016-7606(1946)57[115:cttpoh]2.0.co;2},
  url = {https://pubs.usgs.gov/publication/70215040},
  note = {Source identifier: 70215040}
}