@misc{indiciae9f319081c2bd,
  title = {Introduction},
  author = {M.L. Morrison and L.S. Hall and S.K. Robinson and S.I. Rothstein and D.C. Hahn and T.D. Rich},
  year = {1999},
  url = {https://pubs.usgs.gov/publication/5211383},
  note = {Source identifier: 5211383}
}