@misc{indiciaeaf8d68c3cc62,
  title = {Nonlinear dynamic analysis of structures. Volume 1 - Nonlinear damping in structures Final report},
  author = {Chang, C. S.},
  year = {1970},
  url = {https://ntrs.nasa.gov/citations/19710003623},
  note = {Source identifier: 19710003623}
}