@misc{indiciaedde2687f06a6,
  title = {Sensitivity of echolocation in cave swiftlets.},
  author = {D R Griffin and R A Suthers},
  year = {1970},
  doi = {10.2307/1540368},
  url = {https://pubmed.ncbi.nlm.nih.gov/5494235/},
  note = {Source identifier: 5494235}
}