@misc{indiciaeff3bbafbc4a9,
  title = {The seismic method in subsurface exploration of highway and foundation sites in Massachusetts},
  author = {Louis W. Currier},
  year = {1960},
  doi = {10.3133/cir426},
  url = {https://pubs.usgs.gov/publication/cir426},
  note = {Source identifier: cir426}
}