@misc{indiciae85cfe67d629c,
  title = {Coal-seismic, desktop computer programs in BASIC; Part 5, Perform X-square T-square analysis and plot normal moveout lines on seismogram overlay},
  author = {W.P. Hasbrouck},
  year = {1983},
  doi = {10.3133/ofr83350},
  url = {https://pubs.usgs.gov/publication/ofr83350},
  note = {Source identifier: ofr83350}
}