@misc{indiciaef11a9224630f,
  title = {A probabilistic estimate of maximum acceleration in rock in the contiguous United States},
  author = {Sylvester Theodore Algermissen and David M. Perkins},
  year = {1976},
  doi = {10.3133/ofr76416},
  url = {https://pubs.usgs.gov/publication/ofr76416},
  note = {Source identifier: ofr76416}
}