@misc{indiciae5e401de8f01c,
  title = {Duct-lining materials and concepts},
  author = {Feder, E. and Mangiarotty, R. A. and Marsh, A. H.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690002215},
  note = {Source identifier: 19690002215}
}