@misc{indiciae8d3af46c00f7,
  title = {Observations of eruption clouds from Sakura-zima volcano, Kyushu, Japan from Skylab 4},
  author = {J. D. Friedman and G. Heiken and D. Randerson and D.S. McKay},
  year = {1976},
  url = {https://pubs.usgs.gov/publication/70011024},
  note = {Source identifier: 70011024}
}