@misc{indiciaedcf3b7af1d5f,
  title = {Modal vector estimation for closely spaced frequency modes},
  author = {Craig, R. R., Jr. and Chung, Y. T. and Blair, M.},
  year = {1982},
  url = {https://ntrs.nasa.gov/citations/19820014643},
  note = {Source identifier: 19820014643}
}