@misc{indiciae43ae46f863f3,
  title = {The geologic importance of the lime-secreting algae, with a description of a new travertine-forming organism},
  author = {M.A. Howe},
  year = {1932},
  doi = {10.3133/pp170e},
  url = {https://pubs.usgs.gov/publication/pp170E},
  note = {Source identifier: pp170E}
}