@misc{indiciae10148c331b0e,
  title = {The dependence of peak horizontal acceleration on magnitude, distance, and site effects for small-magnitude earthquakes in California and eastern North America},
  author = {K.W. Campbell},
  year = {1989},
  doi = {10.1785/bssa0790051311},
  url = {https://pubs.usgs.gov/publication/70015318},
  note = {Source identifier: 70015318}
}