@misc{indiciaef4e800a65a7a,
  title = {Spherulitic rhyolite dike from Goat Island, southeastern Alaska},
  author = {Walter R. Vennum and G. Donald Eberlein},
  year = {1977},
  url = {https://pubs.usgs.gov/publication/70156444},
  note = {Source identifier: 70156444}
}