@misc{indiciaeab172d36781e,
  title = {FORTRAN programs for calculating nonlinear seismic ground response in two dimensions},
  author = {W. B. Joyner},
  year = {1978},
  doi = {10.3133/ofr78287},
  url = {https://pubs.usgs.gov/publication/ofr78287},
  note = {Source identifier: ofr78287}
}