@misc{indiciae02eb849b1b94,
  title = {Contributions to economic geology, 1905 : Asphalt},
  author = {J. A. Taff and C. D. Smith},
  year = {1906},
  doi = {10.3133/b285h},
  url = {https://pubs.usgs.gov/publication/b285H},
  note = {Source identifier: b285H}
}