@misc{indiciae56db19818013,
  title = {Coalbed methane in Hungary, workshop and field trips: September 14 - October 1, 2002},
  author = {Edwin R. Landis},
  year = {2003},
  doi = {10.3133/ofr0386},
  url = {https://pubs.usgs.gov/publication/ofr0386},
  note = {Source identifier: ofr0386}
}