@misc{indiciae6642f1ee248e,
  title = {Joint spacings, mineral modes and grain size measurements for selected granitic rocks in the northern Rockies and in southwest England},
  author = {Judy Ehlen and E-an Zen},
  year = {1990},
  doi = {10.3133/ofr9048},
  url = {https://pubs.usgs.gov/publication/ofr9048},
  note = {Source identifier: ofr9048}
}