@misc{indiciae0cc4b656ed62,
  title = {A brief review of borehole geophysical logging activities in Armenia},
  author = {B.S. Pierce and Grigor Grigorian},
  year = {1999},
  doi = {10.3133/ofr99561},
  url = {https://pubs.usgs.gov/publication/ofr99561},
  note = {Source identifier: ofr99561}
}