@misc{indiciaebd5f8a19b2e9,
  title = {Generalized thermal maturity map of Alaska},
  author = {M. J. Johnsson and D. G. Howell},
  year = {1996},
  doi = {10.3133/i2494},
  url = {https://pubs.usgs.gov/publication/i2494},
  note = {Source identifier: i2494}
}