@misc{indiciae578da05771a4,
  title = {The system K2Mg2(SO4)3 (langbeinite)-K2Ca2(SO4)3 (calcium-langbeinite)},
  author = {G.W. Morey and J.J. Rowe and R.O. Fournier},
  year = {1964},
  doi = {10.1016/0022-1902(64)80232-3},
  url = {https://pubs.usgs.gov/publication/70010628},
  note = {Source identifier: 70010628}
}