@misc{indiciae9bfb84be409f,
  title = {Annual program report, 1976-77},
  author = {E. F. Hubbard},
  year = {1977},
  doi = {10.3133/ofr77423},
  url = {https://pubs.usgs.gov/publication/ofr77423},
  note = {Source identifier: ofr77423}
}