@misc{indiciae6ec8e94e45e0,
  title = {The rate of growth of stalactites},
  author = {W. D. Johnston},
  year = {1930},
  doi = {10.1126/science.72.1864.298},
  url = {https://pubs.usgs.gov/publication/70010904},
  note = {Source identifier: 70010904}
}