@misc{indiciaeb7734e596d0c,
  title = {Digital processing of array seismic recordings},
  author = {Alan Ryall and John Birtill},
  year = {1962},
  doi = {10.3133/70039126},
  url = {https://pubs.usgs.gov/publication/70039126},
  note = {Source identifier: 70039126}
}