@misc{indiciae7abda798d7f5,
  title = {The significance of drafts in steam-boiler practice},
  author = {Walter T. Ray and Henry Kreisinger},
  year = {1909},
  doi = {10.3133/b367},
  url = {https://pubs.usgs.gov/publication/b367},
  note = {Source identifier: b367}
}